You own copyrite even without a licence included, I know all of this generation and especialy on LINUX think a GNU licence should be included, but its not nessasary, if I write a story for example I own copyrite even if I dont do anything.

the program is completely free to use, and the output graphics are your own property.

I cant find source code, I had a drive go down, but i will keep looking.

have you tried Virtual box on linux you can install a diff linux in a box, or XP or something.