I think I have solved the problem posed.
The sensitive documents that are protected, in the latest versions of Avast, I imagine have been divided by risk categories. My documents, however protected, are all at reduced risk.
That said, considering the fact that the version of Avast Premier is full of features that I personally do not consider essential for me, I decided, after trying the latest versions, to return to the free version that has a definitely reduced impact on the performance of my PC.
Too bad that by performing the intelligent scan, and I wonder why, we are still analyzing sensitive data that can not be protected but only skipped / ignored.