Downgrade from 5 to 1

Sometime after v 5.2.1, Contact 7 lost the ability to process entries from Edge and Chrome. Usage by our customers dropped 90%.
There are pages of comments on this forum sharing the “spinning ball” symptom. There’s been no response from the developer in the past month, a very bad sign.
We finally used WP Rollback to take us from 5.4 to 5.2.1 and problem solved.