RUBIX Bulk Price Editor

I cancelled a task that was in progress and some products remained on sale with no possibility of returning to the original prices. I reported the problem and support told it was my fault because I ran two tasks on the collection at the same time. It's not true because I waited for the first task to be cancelled before run the second task. Support didn't give me a quick solution and just sent me a table with the old prices. The app is good value for money, but there are some bugs to fix.