I have exactly the same problem that I reported to support the other day (Ref ECS-13697). Affecting PC (Win 10), iPhone & iPads. I was told to carry out the same procedure as Mikey2233 above, but was unsure if "Disconnect sync from all the devices" included my PC as well as phone/tablets. Queried with Pratyush Sharma, but waiting for a reply.
Update: Just had an email from Enpass Support about ECS-13697 to say that as I had not replied within 72hrs (which I had), they've closed the case!