Thanks ScorpioPirate for quick answer. I was searching for any file named *sygic* and couldn't find any in /system/lib/ , especially these *.asec1 ones.
I deleted any *sygic* file and reinstalled trial version without success, i.e. no new trial time, just same enter code or quit.
I've seen same tip in other forums, could it be an old cleaning method not working anymore?
Maybe only 100% working solution is the factory reset?