Version 4.2.11 and After do the following:
From registration enter "delete data" in the name
You will be asked "Are you sure you want to delete databases? If you answer yes data cannot be recovered. Answer YES.
Then you will be prompted for a password, enter "yes"
Empty databases will be created old data will be overwritten.
For network version do this from server only.
Warning: This will delete all existing data, only use after testing prior to real data being entered.
In versions before 4.2.11 do the following:
Deleting Data after running fake info for testing, prior to actual data being installed.
Warning: This will delete all existing data, only use after testing prior to real data being entered.