1) Browser and version.
2) WordPress version.
3) Plugin version.
4.3 (Not 4.2.2)
4) Is the problem reproducible every time?
Two separate sites - same results. Plugin active - no ediatble widgets. Plugin deactivated. Widgets back to full function/editability.
5) Is the username and password filled out on the option page?
username and password not filled in.
6) Anything else you can provide to help track down this issue.
Thanks for looking into this and providing an awesome tool for WordPress!