Item description:

ALWAYS BACKUP YOUR SAVE FILE!
The editor will make a backup of the save file you open in the same folder as the save file with the extension of .old. The editor makes this backup at the moment you open the save file.

The editor should be pretty self-explanatory, see the screenshot below.

Some notes:

There is a context menu in the overclock tree listing to add overclocks to the inventory
You can CTRL+Click on overclocks to select more than one
Changing XP values will update the other relevant fields when the focus changes (i.e., click on a different part of the program or another program entirely)
If you have promotions beyond Legendary 3 those promotions will be preserved as long as the drop-down is set to "Legendary 3+". If you don't have enough promotions for a specific dwarf and set them to "Legendary 3+" it will keep whatever the original value was.

Troubleshooting
If the editor fails to start, please add a second line to the "start editor.cmd" that's just "pause". This will let you see any error messages that will be necessary for bug fixes.

If the editor opens but doesn't edit your save properly (i.e., values not being read properly, changes not being reflected in-game, etc) please open an issue, describe the problem as thoroughly as you can, and attach a copy of your save file from BEFORE any edits were attempted.