Is it possible to downgrade a project? There seems to be some bugs in 5.3, will they be fixed?

I still have the last version backup, maybe a week ago, I’m not familiar with versioning system. I just didn’t want to lose the increments I’ve made recently. At 5.3.1 I don’t know if they would fix these in 5.3.2 or something, so maybe I should use the backup, I’m not sure.