It is not currently possible to choose a different location for the audio store. A workaround is to use a junction to remap the C:\ProgramData\PlayIt Manager\AudioStore folder to another location. Please follow these instructions:
1. Stop PlayIt Manager running.
2. Move C:\ProgramData\PlayIt Manager\AudioStore to another hard drive location, for example H:\
3. Go to Start Menu and type cmd.
4. Type cd "C:\ProgramData\PlayIt Manager" and press enter
5. Type mklink /J AudioStore "H:\AudioStore"
This will create a junction link between C:\ProgramData\PlayIt Manager\AudioStore and H:\AudioStore
All future uploaded tracks should now be stored on your larger hard drive.