If installation has been via MSI, then the Add/Remove Programs list on a client machine will show the installed browser edition. If you uninstall the product via the Add/Remove Programs list, the plug-in will be removed from the browser and from the MSI list.
When a plug-in is installed in a browser, it is displayed as enabled in the browser's Add-on Manager. If you remove the plug-in from the browser's Add-on Manager, the plug-in will be disabled but stays on disk.
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