The source of install problem as now be identified, it's created by the windwos keyboard local settings... to avoid it or to give a try
Go to regional settings and set the language to English-US. (For Win7, in control panel->region and language, set the location to United States and the keyboard default input language to English-US, in the Keyboard and languages tab->Change Keyboard... ). Then make sure that when you start the program, in the language bar EN is selected.
Mower, TARGET does nothing to the Cougar stuff, doesn't replace or touch any cougar drivers or whatever, it just works throught Direct X. It doesn't use any tool tools from the Cougar. And TARGET and Foxy can live together on the same system without issue.
If you are already a good foxy user and not a big fan of complex configuration, you don't own the MFDs, target as a limited interest for you and don't change of programming language and software will keep your life simple. You have the choice, that's the most important.