The free trial is the full software, Lucy.
Your post is confusing as to what the actual problem is, but as a matter of interest, which Mac OS version are you using?
Thank you so much for your response. I appreciate it. I found out that I had to put an old LR SN in instead of the LR4. Fortunately I still had the box from a few years ago. Apparently the LR 4 was an upgrade also, so they needed the original SN.