MyStart? What does that do (or is supposed to do?)
Open Firefox .. Tools .. Add-ons .. go down the list of extensions to WOT .. click on the 'more' if available .. and hit the homepage link. Have a read through there to see what can be done ..
Or join Mozilla and post a message in the addon developer page .. That's what I have done on odd occasion.
Alternatively .. go to their forum here ..
http://www.mywot.com/en/forum
and have a look through. They may also have a new version available but not approved by Mozilla yet that fixes the issue. I see your last WOT update was July-ish.