The Generic Version has gone through a bit of an overhaul - superficially it looks pretty much the same http://www.ectdemostore.com/generic/ but we have set it up to show that it can be used on responsive designs. This has always been the case but maybe we haven't made it clear enough as it is a common question that comes into us.
Apart from some changes to the design (which most people will discard anyway) we have added a new responsive friendly css file, ectstyle.css to smarten up the product etc layouts.
It is possible of course to use the Generic Version on non-responsive sites if you prefer.
The price is still $159 by the way.
On a related note, if you have used your own design to set up your cart and would like it to be showcased here https://www.ecommercetemplates.com/help/design.asp#generic5 please drop me an email and I'll get it added.