Finished rebranding to PollyMC, the launcher now stores it's data in following directories:
Windows: %APPDATA%\PollyMC
Linux: ~/.local/share/PollyMC
Mac: ~/Library/Application Support/PollyMC
To migrate your data from a previous version you can either manually rename polymc.cfg and the PolyMC dir or you can run the following commands:
Windows copy %APPDATA%/PolyMC/polymc.cfg %APPDATA%/PolyMC/pollymc.cfg && copy %APPDATA%/PolyMC %APPDATA%/PollyMC
Linux: cp ~/.local/share/PolyMC/polymc.cfg ~/.local/share/PolyMC/pollymc.cfg && cp ~/.local/share/PolyMC/ ~/.local/share/PollyMC/
Mac: cp ~/Library/Application Support/PolyMC/polymc.cfg ~/Library/Application Support/PolyMC/pollymc.cfg && cp ~/Library/Application Support/PolyMC/ ~/Library/Application Support/PollyMC/