Could someone please post an update for Mac?!?!
Duplicate your previous version Mac app and rename it personal-trainer-v0-75-domiek-mac
Download the PC version and unzip it
Drill down into the PC version's Renpy folders until you find the folder named "game". Copy the "game" folder.
Right-click the personal-trainer-v0-75-domiek-mac app icon and choose "Show Package Contents"
Drill down into Contents / Resources / autorun
If you're in the right place then you'll see a "game" folder there. Trash it.
Paste the "game" folder that you had copied from the PC version
Launch the personal-trainer-v0-75-domiek-mac app and enjoy
This technique should work for any Renpy game.