2.14.0 / 2.14.1 / 2.14.2 No longer tracking. Downgrade db? (no replies)

It has been 2 weeks since Piwik has logged any visitors since upgrading to 2.14.0 and has continued to 2.14.2.

Is there a procedure to downgrade a database back down to 2.13.1 so I can reinstall 2.13.1 and continue using Piwik?