This tutorial will assist you if you want to start a new BONELAB game but are unsure how to proceed.
How to Reset Your Progress
Your saved files in the “appdata/local” folder need to be deleted. At this time, there is no other option.
- …\AppData\LocalLow\Stress Level Zero\BONELAB\Saves
P.S. You might need to make sure hidden folders is disabled before you can the app data stuff.