I dont even know how to answer this (i probably shouldnt FTT).
Let me try to tackle it logically. The question was “IS it safe?”. To that, are you saying that FSUIPC has a bitcoin mining backdoor, or that it could?
Because if it is the first, you better have proof; and if it is the second - thats an answer to a question nobody asked, and even then the same could be said about ANY AND ALL software you have ever downloaded.