If you’d like, I can:
Before attempting manual hex editing, check if the game's automatic backups can solve your problem. The game creates frequent backups in the SaveBackup : Delete the current GameSaveData.sav
You can move a save from one Steam account to another by replacing the PlayerId (Steam ID) and updating the MD5 checksum stored at offset 4 of the .sav file.
Q: Are Outpost Infinity Siege Save Editors compatible with all game versions? A: Save editors may not be compatible with all game versions or platforms. Make sure to check the save editor's compatibility before using it.