Try this: Go to Character Reset, click the button's next to your character. You know what they do.
Now go in-game and return to Flourite. It might work. Also, Flourite plains is a very huge map with loads of people. I'm not surprised you're crashing there it seems.
But is this only Flourite or is this other places too and stuff?
If it's other places then you might need to reinstall, or possibly uninstall and reinstall.
If you choose that option, then I'd suggest saving your sturf in another folder besides FH like for example, media, screenshots, exports, etc... You get the point.
Hope this helps.