Trial version of what?
For Cloud programs, you log in to your paid Cloud subscription
For a non-Cloud program, you will need to ask in the program forum
This forum is about the Cloud as a delivery process, not about using individual programs
If you start at the Forums Index http://forums.adobe.com/index.jspa
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says ALL FORUMS) to open the drop down list and scroll