Note: Firing up certain mods might cause your vanilla save files to get overwritten or temporarily disappear. If you run into this issue, follow these steps:

    1. Navigate to your local AppData directory: C:\Users\<YourUsername>\AppData\Roaming\SlayTheSpire2\steam (Tip: You can just press Win+R and type %appdata% to get there faster).

     2. Open the folder with the long string of numbers (that's your Steam ID).

     3. Select everything inside this folder EXCEPT the [modded] folder, and copy/paste all those vanilla files straight into the [modded] folder.

     4. Boom! Your save data is successfully restored. You're good to go.