Creo 8 licence activation problem

Hi,

I encountered a problem while trying to reinstall Creo Parametric 8 student edition. I installed it a couple of times but it kept crashing (I am from Slovenia so I installed it through Audax site - I think that they add some pre-made models of bolts..., and it kept giving me errors), so I decided to delete all files related to Creo thinking that it would solve the issue (I previously had Creo 6 and Creo 7 installed, so I thought that the old files were causing a problem). 

But in the process of deleting the files, I managed to also delete my licenses. And the next time that I tried to install the program and to activate the license I got the error saying "You have reached the maximum number of license requests available for your product type". 

So, is there any way to fix this? If so, I would be grateful for any help. Thank you in advance for answering.