Upfront won't load and is making everything move horribly slow

I downloaded the Spirit theme and tried to use upfront, it never worked very well and always made everything go horribly slow. I tried it with Scribe too. Now Upfront won't even load. When using upfront, my site is basically unusable. I'm not at all happy with this product and would like a refund. I talked to a support guys last night but he stopped answering.