system
3
I opened AVAST Free, selected Settings and then Exclusion as directed in help function.
I put the .exe address (the program that created the scanned document and shows on the AVAST popup screen) in Hardened Mode tab and the folder with the files in File Path tab using an * to indicate all spreadsheet files in that folder. I followed the instructions for placement tabs supplied by Avast Help.
This program is replacing AVG which did exactly the same thing and ignored the exclusions also.