Rated 4 out of 5 stars

I will to try this addon on my xUbuntu and find one bug. When I attach file from folder with spaces in path and use "Compress" button addon says: "No file to compress! (Criteria do not match)"

FIXED:
Sorry! I'm not seriously test it before report about "bug".

Solution:
* "General" - "Toolbar button action": "Compress only selected attachment files", "Compress all attachment files if none is selected"
* "Compression" - "Filters" disable "Skip already-compressed files"
* "Filename" - "Source file extension": "Do not filter"

This review is for a previous version of the add-on (0.5.3). 

Thank you for review and for this report. Could you please contact me at official email address: autocompressfile@gmail.com? I would like to be in touch with you to understand how to solve the problem. Thank you. Regards.
EDIT : It's generally a very bad idea to disable "source file extension filter".
If there is no bug, please could you check your 4-star review.