Is it possible to set the tool preferences and file association after Vivado has been installed?
With Vivado 2014.1 or later a user can use the following steps.
1. Launch the network-setup installer C:\Xilinx\.xinstall\Vivado_2014.1\networkShortcutSetup.exe
2. In the product selection tree, unselect all of the checked installation options. (Leaving them selected will not cause any issues but is unnecessary)
3. In the destination panel unselect the program group shortcut creation (Create program group entries), but keep the desktop shortcuts and the Create file associations.
4. Complete the installation process.
Your file associations will be restored to 2014.1.
File associations can also be set using the Windows "Choose Default Program" option.