I've used 7Zip before, but somehow I got a hold of an install with malware. Your software didn't id and stop it. Why am I paying you if you don't work?
Then I went to get help. You have no email help. Only chat and these forums. The chat person was unhelpful and sent me a url to a "solution" that didn't have to do with the problem.
I searched the internet and found Malwarebyte's solution. I went through the steps and it worked. So a chain of freeware fixed a problem you allowed to happend, couldn't identify and couldn't fix.
When my subcription is up, I'm gone.