I bought Fundraising in 05 / 23 / 2014 and I wanted to buy

Hello,

I bought Fundraising in 05 / 23 / 2014 and I wanted to buy it again to be able to upgrade it (19$) but I cannot.

Apparently it's because I have also Event+
How can I do to get an upgrade of Fundraising without joining a gold member? I run a wordpress 4.0.1

Thanks a lot.

Lionel