Now you can use trial version of a software again n again to the unlimited time. For purpose you have to do some simple steps as follow:-
Step 1: First thing to do is uninstall the application.
Step 2: Press Windows Key+R and Type "Regedit".
Step 3: Go to HK Local Machine => Software => Your Software name. Delete the Key. Do this for HK Current user if there exists a key of that software.
Step 4: Go to run type "%temp%. Delete all files. Well, they are just temporary files so it won't matter, it will only clean up ur pc little bit if not anything else.
Step 5: Go to Users => Username => Appdata,Check all 3 directories that is "Local", "LocalLow", "Roaming" for your software entry. Delete that.
Step 6: Reinstall application and enjoy the next trial. Have fun..
Just perform this everytime trial expires.
NOTE:- Before performing the step 5 check that you have set your PC to show hidden files and folders otherwise you can't able to see the Appdata folder.