Did you figure out how to get it to sync to iCloud again?
Enpass on one of my windows machines is now stuck "Synchronizing..." for the last two days. The only advice I've found online is to disconnect it from iCloud and sign back in. Unfortunately I haven't found any way to disconnect it. I think the disconnect button only shows up when it's not syncing (which is never).
After finding another issue on my computer that didn't seem related, I was instructed to "runnetsh winsock reset as Administrator and then reboot my computer". It didn't fix the other issue, but it did fix my Enpass syncing! Hope it helps others too.