I have 2.7 on my system with a licence key from work. I am now no longer employed by the company & wish to d/l & purchase the latest version. Please can I have some advise as to whether I should:- 1. Uninstall 2.7 then install 4.x 2. Install 4.x over the top of 2.7 3. As 1. but reboot between uninstall of 2.7 & install of 4.x 4. Anything else I need to know? Any help would be much appreciated!!