[Again] Which one to buy?

[isd_isd]

http://shop.digitalriver.com/dr/v2/ec_MAIN.Entry17c?CID=194404&PN=5&SP=10007&SID=52397&PID=793953&CID=0&CUR=840&DSP=&PGRP=0&ABCODE=&CACHE_ID=194404

For the link above, I know I need to select a version for Manga Studio, but I don't know which one of the 4 I should select. Can anyone help?

And, for the apology in advanced ==> Er- sorry for being stupid, or a newb, or anything related... I just need help.

[crispy]

It depents on what operating system you are running, and whether or not you want to wait for the company to ship you out the package with teh install files on disk, or whether you want to just download the files immediately.

[HolyVampire32]

I tried clicking on the upgrade to find out how much it runs but I keep getting an error, anyone know how much the Upgrade for Debut costs?

and does anyone know if Manga Studio is sold in stores?