OS2XL Free Demo.... do I have to buy OS1 first?

Just installed OS1 no problems but I really want to try OS2XL.

I'm gathering I have to buy OS1 first before I can try OS2XL, is that right?

I really just want to try the arpeggiator feature to see if it sends MIDI out in real time.

You have to install OS1 before you can install OS2/OS2XL.

If you want to purchase OS2/OS2XL you need to pay for OS1 at the same time.