Hi! I just purchased your plugin and like it a lot! I could find an unwanted error within it though, when I tried to set up my validation.
First I changed the error messages and saved. Everything worked brilliantly. Then I changed my theme to Theme 3 and found out that my error messages were reset back to defaults. I rewrote them, and found out that now my theme selection was back on Theme 1. These two pages seem to reset each others when saving them. Is this something you’ve noticed before or is it something new?
I managed to reproduce the problem even with all the other plugins as deacivated, so this must be an error within your validation plugin.