Bug: Unavailable for your code revision does not reset on selecting new ISO

[dreamsyntax]

Reproduce steps:

Have a clean non-MCM header ISO:

1. Open it, manually set version to 1.05 with the picker, with only 1.06 compatible codes
2. Reset the ISO in the same file path (so no MCM header is written)
3. Re-select the ISO, manually set version to 1.06 with the picker
4. Notice 1.06 codes still say "Unavailable for your code revision"
5. Restart MCM
6. Re-select the ISO, note the version does not need to be picked as the MCM header is written
7. Codes are properly selectable in the list