I paid Automessage plugin 1 year ago and cancel

Hello,

I paid Automessage plugin 1 year ago and cancel subscription.
Now I want to buy Wiki Pro https://premium.wpmudev.org/project/wordpress-wiki/. If I see as non login use I see 19$ per month price for single plugin. When I login it asks me to upgrade my account http://prntscr.com/8oq7y3 with price 97$ per month. I don't need support, only plugin. May I pay only Wiki Pro plugin? How will it cost? How can I do it with paypal?

Thanks