I have updated the program and Sandbox is back again. That’s a releif. From reading other posts I was beginning to think the feature had been removed. I also seem to be able to move my PE files around again without them getting flagged. Of course I took precautions making sure I had made all important backups first (not knowing if my settings would remain the same). Now I also can download the file, which will be updated in due course - it is an unfinished program released for assessment purposes. I use it all the time in its unfinished state - hmm.

I apologize if I said some negative things about Avast. I was alarmed at what happened on friday. In a way I have learned some interesting things, but it was also a bit like having hiccups. Making my own file integrity verification utility is now on my ToDo list.

Thank you!