Cubase Artist 6/7 Comparison (help?)

Hi guys,

i am definately going to purchase a hard copy of Cubase Artist 7 (so an Upgrade from my current Artist 6). Its 140 GBP delivered by my regular ebay music shop (Absolute Music Solutions who are excellent).

Does anyone know if there is a TIME LIMIT from when you purchase the item to when it needs to be installed (like 28 x days or something) ??

Ta,

Paul