Is it possible to rollback to a previous version of upfront editor?

Is it possible to rollback to a previous version of upfront editor? Ever since I updated to the latest version I can’t edit my site, Update Editor just spins for eternity. I can’t seem to get an answer to this problem and it’s making me want to drop the service because this is a business site that needs to be edited and I need to access it.

I’d really appreciate some help, please.