Can I remove all parties and start fresh in one of the separate companies?
Yes, you can remove all parties and start fresh in BUSY. To know how to delete them follow these steps:
Step 1: Open your company then go to Administration menu.
Step 2: Select Masters and click on Account.
Step 3: Click on List and can view Group of Account and see debtors, creditors, etc list
Step 4: After opening the list you can select all and press F8 to delete.
Note: If a party master is used in any transaction it can not be deleted.