Back in 2009 I bought Lightroom 2. I mostly use it on my laptop at home. Now that I travel a lot, I would also like to use it on my secondary laptop.
If I upgrade to Lightroom 5, can I install it on both laptops and run my library on an external HD between the 2 machines (personal use, nothing huge so no worries about speed)
Yes, the licence is for installation/use on two machines.