Problem with uninstalling unity 3D on mac

Hi, I'am a new mac user and i have been using the unity pro trial for a month, now when it is expired i wanted to use the regular version (and hopefully soon update to iOS) .

I am experiencing some problems with trying to open unity now.

I deleted the unity folder and the license file folder in the HD/LIBRARY/... restarted the computer,,, tried to install again,... no success, unity still remembers that I have 0 days left and doesn't give me any options to choose to install the regular version. I tried to download it again and to install it again, that didn't work also.

Please HELP!!! :) .....