v0.5.0 or v0.5.1, ideally not unpacked and not modded.
The v0.5.2 full here isn't an official release and is unpacked, so may have problems patching it to v0.6.
To clear all your previous progress you'd need to delete the persistent file, which is where those unlocked renders are stored.
Ren'Py keep copies of your save files in two places, you need to delete the persistent file from both (I'd create a backup first):
<Wherever you installed BaDIK>\game\saves\
C:\Users\<Your username>\AppData\Roaming\RenPy\BeingaDIK-1535311494 or win+r %appdata%\RenPy\BeingaDIK-1535311494