I am trying to reinstall Lightroom 5.7 on a new computer. When I try to register it I type the SN for 5.7 but then it wants the SN for the previous version 3.5. I upgraded from LL 3 to LL 5 in 2014. I have no idea where the LL 3 SN is. All that is left of LL 3 is a few folders in "Program Files" and some lrcat files. Is there any hope of finding the number I need. Thanks
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