There seems to be a massive bug with exporting and then importing the Directory Opus File Types.
- Make a backup of your entire configuration. This is REALLY important if you customized File Types a lot and don't want to spend a lot of time restoring them without a backup like I did.
- Go to File Types -> File -> Export -> All Directory Opus file types and save that file.
- Double click All files and folders
- Go to Context Menu tab and delete everything there except for Properties.
NOTE: With step 3 and 4, basically you can just do any modifications. These steps are just for consistency. - Import the file made from step 2.
The deleted items from Context Menu are not restored even though they are present in the file made in step 2 (through notepad). In addition, all associated file extensions for File Type Groups (Archives, Documents, Images, and etc.) are wiped clean. All paths to Context Menu icons are also wiped. Seems like a pretty bad bug here. The file made in step 2 looks to be perfectly fine though so something is wrong with the import function.
Spent quite a bit of time figuring out what's going on and redoing all the changes to the context menu items that I made since I had no other backup of the configuration because I just started heavily modifying File Types the other day.