shop-bar-solutions review for Bulk Price Editor Pro

I have around 2000 products. I applied a -10% discount to the entire catalog, and the task executed on a few hundred products before it got stuck. Then it restarted on its own from the beginning, applying the -10% discount again to the products already processed. The first execution of the task doesn't appear in the history, so it's impossible to roll back. After explaining the issue to support, I wonder if they even bothered to read my message because their response was completely off-topic.