Fundraising - aspects of WP not working properly since installation

I love the fundraising plug-in. It was very easy to set up. But various aspects of the site itself have been unresponsive - or even non-functioning - since I installed the fundraising plug-in last night. For example, I can not upload jpegs to the library. I was fortunate to have a good number of images to choose and went on to complete the project, but numerous times had to fight with one thing or another that was responding in an unusual way.