Oddly, I don't think there's a way to "sidegrade" to Extended...
I thought of just getting the regular version thinking I would do that but couldn't find a way to sidegrade - so I wen ahead and got Extended because I also do a lot of video work.

May as well...

If you have a way to texture your models (I think UV Unwrapper is free...?), and have general video software, do you need Extended?