Doesn't look like anything major.
You mean registration code? You get that by making the $39 payment to Mark/Tuner Pro. This gets rid of the 10 second nag window that happens when you first start the program. The program is fully functional after the initial 10 seconds. TunerPro is a free. Can't connect TunerPro RT V5 Good. Prolific #2303 USB to Serial adapter. After jumping terminal's 'A' & 'B' together and turning the key to the ON position. More Tunerpro Rt Registration Key videos. Shareware Junction periodically updates pricing and software information of full version from the publisher using pad file.