You can just edit your save file. Save files are the .json files here:
- Windows: C:\Users\*username*\AppData\LocalLow\Glitch Pitch\Idol Manager\data\
- Mac: ~/Library/Application Support/Glitch Pitch/Idol Manager/data/
Open the file with a text editor (notepad or whatever), in the beginning of the file there should be something like "resources__Resources":[ {"Type":"0", "Val":"5000000"}
You can change the value here and save the file.