I heard that the T-Dev is unable to do anything after a certain period of time, or something along those lines. Is it true?
No, they work like NR-Readers when you dont have the USB adapter and disc. I havent had any issues with mine.
Pretty sure that's referring to your CodeWarrior or ProDG license. There's cracked versions so it shouldn't matter.
The version that comes with the USB adapter just seems to nag you when you boot it up. Still seems to work without a license.