With AppleCommander 1.8.0 on macOS Monterey 12.6.8, my changes to disk images are silently discarded unless I explicitly click the Save toolbar button.

To reproduce:

1. Open a disk image
2. Modify it in some way (for example: select a file and delete it, which asks "Are you sure you want to delete this file?" and I click Yes)
3. Notice that the modification has taken place (for example: the file is no longer in the listing)
4. Close the window

No alert appears asking me whether I want to save the changes to the disk image before closing it. I might assume therefore that changes get saved automatically. However, if I reopen the disk image, the file I deleted is still there. My changes were lost.