Plugin Alliance plugins are activated via a file named pa.license. The file is specific to the user account on both macOS and Windows.
On macOS, the file is located in the Plugin Alliance folder under ~/Library/Application Support. ‘~’ points to your user directory. To open your user library folder, switch to the Finder, select the Go menu and press the Option key. Your Library will appear and you can open it and navigate to Application Support, then open Plugin Alliance.
On Windows, the file is located in the Plugin Alliance folder in your APPDATA folder. This folder’s location changes depending on your user account name and Windows version. To find out the location of your APPDATA folder, press Windows Key and R at the same time, type cmd and then hit enter. A command line window will pop up. Type ‘set APPDATA’ . This will reveal the APPDATA location in your file system.