Cannot change to free version after Professional evaluation?

Hi,

After trying Draftsight Professional evaluation for a few days i uninstalled it and found i only need the free version. But after reinstalling and checking the 'free' version it still comes with the message that i only have the 30 days trial. Here is what i did:

1. Installed evaluation Draftsight Professional. Tried it for a while

2. Uninstalled the professional and then installed the free version

3. The PC still thinks this is a professional install even i put a 'dot' in the free version 

4. When the program starts i get the message that i have 30 days left to evaluate 

How to clean up before free version installation?

Best regards,

Allan