Maybe you can turn off the Screen Capture program over the weekend?
Seems Avast is operating as it should/does and your screen capture program is doing the same.
If you are using Avast Free, these pop-ups cannot be turned off unless you do a Custom Install of Avast Features, and, even then, some advertising will still come to the fore. One of these settings to clear is Avast Cleanup, you shouldn't as much advertising about Cleanup after.
The only way to really minimize pop-ups in Avast is to purchase a paid version and change advertising settings within that program.
What is the point of running your capture program?