Yes, the fact, that BfA gets flaged by windows and the virus scanner is a complete turn off. If I wouldn´t have used the “portable” version before, I might actually have dismissed it as usable.- Which would have been real shame, since it is such a great program.
Not sure, what´s going on with the install on your computer, did you try to delete the BfA directory and the directory it created in C:UsersYOUR-USERAppDataRoamingBforartists … and then started with a freshly unziped version?