Coursepress 504 errors, having to remove to access wordpress dashboard.

Hi there

I'm having a bit of a problem with coursepress causing 504 errors on our site.
To the extent that the only way i can access the wordpress dashboard is by removing the plugin via ftp.

I've spoken to our hosts and they have the php settings set to the max i'm allowed on the hosting plan, i've read through the forums here and checked around to increase them. Still, after doing that i'ts still stuck.

Any ideas on how this can be resolved?
We've got a few courses on there and it was fine, now it seems to have stopped functioning like before and 504 erroring.