I currently have light room 4 and I want to upgrade to 5. I downloaded LR 5 but could only have the option to use LR 5 as a "trial version for 30 days". Now that the 30 day trial is over I can't use it unless I purchase the full version. I guess my question is do i have to buy the full program again? thank you in advance for any help anyone can offer.
You may buy the upgrade for Lightroom , however you can buy Lightroom 6 from Adobe not Lightroom 5.
You probably ought to upgrade to Lightroom 6, rather than Lightroom 5 (unless you have a 32 bit operating system, in which case you can only upgrade to Lightroom 5).
You can upgrade to Lightroom 6 for 79 US Dollars, or some similar price in your country.