More suggestions:

1. How about removing the popup menu option and adding a context menu option to the archive types it supports?
2. It should automatically extract to a folder named after the archive if there's no folder already specified in it and it has no .exe/.msi files in it.

I have some suggestions for it:

1. Add an option to have it either extract to a designated folder or allow the user to choose where to extract.
2. Add an option to disable the creation of a folder that's named after the archive.
3. Show the progress (the file that's currently being extracted and a progress bar) of the extracting of an archive instead of a box containing a Cancel button.
4. Add support for passworded archives and have it use a list of saved passwords.

Thanks in advance for adding them.