This is a legitimate concern. Editing save files is not a hack; it is a single-player modification. TML-Studios does not ban players for using custom saves. However, to stay safe:
Before replacing anything, rename your existing folder (e.g., SaveGame0_Backup). This prevents losing your own progress. fernbus simulator save game 100 work
Yes, but with a caveat. Due to frequent updates (especially with the Fernbus Simulator “Next Gen” updates), older save files may cause crashes. The working method below is verified for Steam version 1.27 and newer. This is a legitimate concern
Steam Cloud can overwrite your new 100% save with the old broken one. to stay safe: Before replacing anything