Ah, FH+ is full of glitches, so many that people quit using it, Until it if updated and fixed again. For now, you can just reinstall FH+, make sure you fully delete the old FH+. Sorry about this issue. You may keep logging in to see if it goes away, because there is a chance it might. You do not need to uninstall the normal FH, it has no effect on it. But if the glitches on FH+ continue, you may want to stick to just normal FH, until FH+ is fixed. Hope this helps!
If you go look under member made tutorials, there is one that sameth made about the FH+ blackscreen, check it out, it will be of great use to you (: