The upgrade options are confusing me!

On the packages page there is a line with nothing but 2015 PlusPAK ($99).

Then there is a line that says "Upgrade from 2014" and then it has Pro ($59), MegaPAK ($79), UltraPlusPAK ($139), EverythingPAK ($159).

Last year I bought 2014 PlusPAK to upgrade my 2013.5 UltraPlusPAK to 2014 UltraPlusPAK. I also purchased the video tutorials separately.

I am pretty sure I an entitled to buy 2015 PlusPAK ($99) but what if I want this on hard drive? Am I entitled to buy UltraPlusPAK ($139)?

What if I want the EverythingPAK this time? Am I entitled to purchase EverythingPAK ($159)? Or, would I need to do some sort of crossgrade option?