Lightroom...I need to reformat my PC hard drive. I have LR3 full version, updated version 4&5. Will I need to install 3, then 4, then 5?
You will just need to install the latest version of LR5 i.e. 5.7.1 and enter the LR 5 upgrade key and it will prompt to enter the previous version key. Enter the LR 3 serial number and that should work just fine.
Retrieving data ...