Describe the bug
Rar installed using Homebrew. Path in Preferences > RAR Tools is "/opt/homebrew/bin/rar" but CBR files still load as R/O, I get a pop up prompting me to install Rar every time I try to tag a CBR file, and the Save Tag(s) button is greyed out.

However, the GUI's prompts seem to be incorrect. I can in fact save tags to CBR files if I do the following:

To Reproduce

• Drag in a CBR file and click OK to get past the Rar warning
• Search Online for metadata (only works one file at a time--Auto-Tag will not attempt to search)
• Once the metadata is loaded, right-click on CBR in the file list and choose to remove the file
• A pop-up will open saying that changes will be lost if I don't save and give me the option of a Save button
• When I click the Save button, the metadata is successfully written to the CBR

This works every time. ComicTagger thinks it can't write to CBR files but in fact it can.

Expected behavior
CBR files should load without the R/O flag and should work with Auto-Tag as well as the one-file-at-a-time option. The Save Tag(s) button should be usable and it should not be necessary to remove the file from the list in order to save the tags.

Desktop (please complete the following information):

• OS: MacOS 15.3.2
• Version 1.6.0b4
• Where did you install ComicTagger from? releases page

Additional context
I'm mostly working from my NAS, but I tried copying some CBR files to my local drive to see if the behavior was any different, and it was not. CBZ files all behave normally.