To use Calibre, I have to disable Avast

Is there a way to set Avast to ignore Calibre? I have had so many problems with the paid version of Avast. This is just the latest. :frowning:

What is Calibre?

Is there a way to set Avast to ignore Calibre?
What is it that avast does? .... describe the problem

After loading an ebook I am unable to save edited metadata or book cover (even from image on my computer, not downloaded).
Error:Locked file: C:\Users\T_H_M\Documents\Calibre Library\Sebold, Alice\The Lovely Bones (25)\cover.jpg

Traceback (most recent call last):
File “site-packages\calibre\gui2\metadata\single.py”, line 579, in apply_changes
File “site-packages\calibre\gui2\metadata\basic_widgets.py”, line 1210, in commit
File “site-packages\calibre\db\legacy.py”, line 713, in set_cover
File “site-packages\calibre\db\cache.py”, line 63, in call_func_with_lock
File “site-packages\calibre\db\cache.py”, line 1230, in set_cover
File “site-packages\calibre\db\backend.py”, line 1427, in set_cover
File “site-packages\calibre\utils\img.py”, line 221, in save_cover_data_to
File “site-packages\calibre\startup.py”, line 116, in local_open
IOError: [Errno 13] Permission denied: u’C:\Users\T_H_M\Documents\Calibre Library\Sebold, Alice\The Lovely Bones (25)\cover.jpg’

Hello,
is there some alert window from Avast (post a screenshot of it, please)? I just guess, but maybe Antiransomware shield can block this changes.

Milos