Suddenly not working on Amazon Rated 4 out of 5 stars

Love this app. Use it to follow wanted items, get notifications when price drops to selected level, check price history. Unfortunately, it has stopped working on Amazon's site (hence only 4 stars). Still up on NewEgg. Google search on this failure doesn't provide any useful info. I'm wondering "why me?"

This review is for a previous version of the add-on (1.2).