Question about licensing 3.8 to vB4
 

I'm considering buying the upgrade to vB4 - the price isn't an issue for me but I would be very worried about the lack of mods and potential bugs to be fixed etc. in the short term. (especially as there is no demo to show what is included or how it works etc).

If I go ahead and purchase vB4* download it when it is available but don't install it for say 6 months - will I still have a valid license for vB3.8? Eg will I still be able to get support for vB3.8 up until the point that I install vB4 (even if it is a year later?)?