Version 12 screwed up my very complicated window position profile. I think it may have erased it. How do I go back to the previous version without using system restore?

One good thing about the new version, the ui handles the hi dpi of my monitors perfectly, as far as I can tell.

Window placement functions don't seem to be working properly with the splits!

Tried using system restore point I made before upgrading to 12, but now DF service runs, but no tray icon, no taskbar on second monitor. This machine has a Steam license for DF, does that have anything to do with it? I can't even uninstall it, it says something about corrupt files and tells me to re-install.

I really should know better than to upgrade DF too soon, I have had many, many problems with it before! I guess now I have to restore from a disk image!

Have a look into your folder documents\DisplayFusion Backups.
If you have a backup there you can restore this.
Just go to the settings of DisplayFusion. Under General (what is opened) you can see at the right corner at the bottom two buttons. One for exporting the settings (making a manual backup) and one for restoring a backup.

Yours

Loeffel

I tried that before I used system restore. I loaded the most recent file, DisplayFusion Backup (2025-12-18 @ 22-03, 12.0.0.0, RONDELL7060, AutoBackup).reg, hoping it would restore all my settings. It did not.

I subsequently used system restore to go back to the point just before I upgraded DF. Now, the service will start, I can see it in Taskmanager, but the tray icon never appears and I can't get the app to open.

I tried to uninstall DF, but a box pops-up and says "The setup files are corrupted. Please obtain a new copy of the program.". When I used Steam to re-install I got no errors, but it still won't start and is un-installable through normal means.

Edit:

Well, I mostly fixed it. I wiped the Binary Fortress branch from the registry, mounted a drive image made hours before updating DF to v12, copied the Program Files\DisplayFusion from that to "C:\Program Files\DisplayFusion", then "re-installed" using Steam, which apparently just loads the license.

Despite reloading the last v 11.1.1.0 settings backup reg file, I had to redo the splits, recreate the window position profile and custom triggers, and lost some of the custom app launchers on the second taskbar.

Lesson re-learned: don't update DF to versions with nothing but zeroes to the right of the decimal point!