You can also add an "Ignore changes" item to the menu, which changes a file's attributes to the "System" mode. This is similar to the unwanted changes in the "Attributes" window that we all dislike.
The add-on doesn't always work correctly. If you need to toggle attributes, then choose the "Make Read-only" option instead. Here's a list of the four commands available through AttrMenu's context menu:

"Make Read-only 50e0806aeb syrefrit