Hi DL187, glad to see you like the program.
About your questions:
1. You can use DeleD lightmapping with DBPro. The problem for now is that the .X export does not export UV coordinates for the lightmaps. You can go around that by writing a DMF importer (DMF being the ASCII fileformat DeleD uses) or by waiting until we get things working with X. Don't know how much time that is going to take though.
2. DeleD is 100% license free for anything you'd like to do with it. That goes for both the LITE and the upcoming PRO versions.
P.s check out the site: DeleD 0.91 is released, which features a Material Editor.