Hi kevinpbs ,
How are you? Long time gone last time we spoke and I apologise, been a bit distracted with other things during these corona times.
I can see you stuck again and I know plugins collision is a difficult one to resolve. Unfortunately, something like this happens and will happen again and again. One fix will cause issue with another thing and so on. If Salva says we do not use any of their systems and their hook (I believe the author confirmed this) is colliding nothing we can do.
In this case, you need to decide whether you need more ATUM or extra product hooks from this author.
If you decide to keep the hooks and need to solve some refunds, do open a private premium ticket. I will handle this for you.
Sorry, we can not be of more help here.
Pavel