Ok, I found the config file. Its in
> C:\Users\USERNAME\AppData\Local\MasterPlan
(just change USERNAME to whatever your username is)
You have to delete this file:
> settings08.json
I tried all the themes and about half of them break the app. Here's the ones I found that worked, and which ones broke it:
Works:
- Moss
- Black Tie
- Blueprint
- Moonlight
- NS-DOSS
- Sunlight
- Terra Cotta
Breaks:
- Cloudy
- Dark Crimson
- Event Horizon
- Golden Hour
- Python
- Template
- Waves
- Zero