Alex Oz is posting the changes on the Il-2 Russian forums. If you like to play with programming your device and experiment all the time it would make sense to keep it updated every week (he’s very creative and comes with updates very often). A stable version of firmware and software is posted monthly on the NA website.
If you’re ‘don’t fix it if it works’ kind of person then flashing and updating the software every 6 months is recommended. In your case it seems like your software version is pretty old and I bet your firmware is too, so maybe it’d be the time to update them both following
one of these guides.