I recently downloaded the trial version of CrazyTalk then took advantage of a discounted offer on the standard version.  
However no matter what I do, I can't install the CrazyTalk 8.  I followed instructions on my laptop to uninstall the trial version before installing the full version but it still won't execute.
Any advice please?

Please can you supply a little more information.

For example, are you using Mac or Windows?, Do you receive any kind of error message? If so what does it say?

Please try to explain exactly what happens when you launch CrazyTalk. Does anything appear on screen? Thank you.