You said that 5.7 is just for casual use, so do you use CC on other machine(s)? If so then just load CC on your laptop. I have CC loaded on my desktop and 2 laptops and an all in one and I can use any of them (1 or 2 at a time), you just need to log into Adobe before using it. Which reminds me I need to update CC on my all in one as I've not used it for a long time.