@JKD, come here, please...

(And sorry for not writing in Spanish)
An Italian fellow in the Hyundai forum has problems with v.183 and both Bootloader and Showwindows, so he is not able to install Tucsy. Both softwares don't load on his system. He put the SD with one of them in the car, the system reboots but nothing happens, and the system reboots again leaving the message about no maps in the SD or something similar.
I have made a test, even if I have an iPhone and will never use Tucsy, and ShowWindows loaded as expected and I was able to installa Tucsy (and to change again the dreaded stock ringtones...).
The only difference from his system and mine is that he had it updated by an Hyundai shop, while I made the update by myself.
AFAYK, could exist any difference between the "original" update and the DIY one?
And one more question: I don't recall now, and I cannot make a try: do the firmware update refuse to "update" a system with the same version installed?