Sorry that I can't be of more help. I've never had this problem. If foxit works fine for you, then the most painless option is to wait for the next release.

If you have time on your hands, I'd still give that complete uninstall, delete all files, then redownload the latest .exe and reinstall a go. Sometimes it can be just a stuffed up file, reg entry or a completely lost file. Usually it will give error warnings, but sometimes, it just uses cpu forever.