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Click Add/Remove Products and Reinstall and proceed to Step 5 (Platform Page) to change or repair an existing installation. For example, use Add/Remove Products and Reinstall to add or remove documentation files for installed products, or to add or remove a product that your license includes.

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Click Change License and proceed to Step 3 (License Page) to update the license of an existing installation. Use this option when COMSOL is installed and you get a new license file. The installer will remove products not licensed any more and let you go through the Add/Remove Products procedure to add or remove products for the new license. If your trial license has expired, you can use the Change License option to reenable a paid license.

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License file: Use this option for any type of regular paid-for license installation. Enter the path to a license file or click Browse to select the file license.dat. This file is sent to you by a COMSOL representative, typically by email.

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Port number and Hostname: Use this option if your license administrator has given you a port number and hostname for a license manager for COMSOL that is running on your organization’s network. Enter the Hostname of the server running the license manager and its license manager port number.

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Three-server redundancy: Use this option if your license administrator has given you three port numbers and hostnames for the three-server redundancy license manager option. Enter the hostnames and license server port numbers of the three-server redundant configuration.

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Install application libraries for all products to install the application libraries for all COMSOL products.

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 Install application library previews for selected products to install previews of the application libraries for the licensed products that you have selected.

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 Install application library previews for all products to install previews of all application files in the application libraries for all COMSOL products.

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Install documentation for all products to install the documentation for all COMSOL products. You can then view and search all COMSOL documentation, even for products not included in your license.

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Create COMSOL Multiphysics 6.3 folder on Windows Start Menu.

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Add Windows Firewall rules for COMSOL programs. This checkbox adds firewall rules that allow COMSOL server programs to open ports and communicate over the network. If you clear this checkbox, you might get a warning from the Microsoft Firewall when you start a COMSOL server program, or a COMSOL server program might not work as expected.

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Associate the .mph file type with this installation. If this checkbox is selected, you can open COMSOL models by double-clicking them.

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Configure security policy. If you select this option, the next page in the installer provides security options that you can either set permanently or as user defaults; see Security Page. If you set a permanent security policy, the security settings in the Preferences window will be read-only.

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For the interface to Microsoft PowerPoint®, which makes it possible to interactively update PowerPoint presentations with COMSOL images and tables, you can choose Install for the current user (the default), Install for all users, or Do not install.

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Enable automatic check for updates. Select this checkbox if you want COMSOL to automatically check for available product updates at startup.

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By default, COMSOL 6.3 uses an included Java 11 runtime, indicated by the Built-in setting in the Java runtime environment list. If you want to run COMSOL with another Java 11 runtime that you have licensed and installed, specify its location in the Location field by first choosing Custom.

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Install LiveLink™ for Excel® for all users. If you select this checkbox, the installation of LiveLink™ for Excel® is global to the machine and is available no matter which user is logged on. Otherwise, the installation is only available to the current user.

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For the products LiveLink™ for MATLAB® and LiveLink™ for Simulink®, specify the path to the MATLAB installation folder. This path can be changed on the LiveLink Connections page in the Preferences window.

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The Install license manager as a Windows service checkbox is selected by default; if you clear the checkbox, the license manager must be started manually and will not be available as a Windows service.

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The Path to the debug log file field contains a file path to the location of the license manager debug log file. Click Browse to choose another file path.

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The Service name field shows the service name, for information only.

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The Additional license manager options section contains the following options:

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Select the Allow running methods checkbox to allow running applications that include methods. If you clear this checkbox, it is not possible to run methods in applications.

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Select the Allow running applications checkbox to allow running applications in general. If you clear this checkbox, it is not possible to run any applications.

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Select the Allow settings forms checkbox to allow settings forms and dialog forms in the Model Builder. If you clear this checkbox, an error message appears if you try to create a new settings form or show a dialog form.

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Select the Allow external processes checkbox to allow applications to start external processes on the computer. This includes using the built-in executeOS() method.

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From the Allow external libraries list, select No (the default), Yes, or Ask to control if external C libraries can be called from methods in an application, either directly or by asking first.

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Select the Allow changes to the runtime system checkbox to allow methods and Java libraries to change the runtime system — for instance, by modifying class loaders.

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From the File system access list, select Temporary and application files (the default) to restrict methods and Java libraries to only have access to such files, or select All files to allow methods and Java libraries to access all files that you have permissions to access on the file system.

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Select the Allow access to network sockets checkbox to allow methods and Java libraries to open sockets for network access.

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Select the Allow control of the network authentication method checkbox to allow methods and Java libraries to control the network authentication method used.

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Select the Allow access to classes through reflection checkbox to allow access to all members in a class through reflection.

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Select the Allow access to runtime security settings checkbox to allow methods and Java libraries to access security settings.