I am trying to install an app from Cydia. I keep getting the "Size Mismatch" error when trying to install the program. From things I've read, that can sometimes happen when trying to get an app that wasn't paid for, and I think I may be running into that problem. I know the app is a paid app ($5) but the line that says "Commercial Package ($5)" doesn't seem to actually be a clickable link and there doesn't seem to be a "Purchase" button. I've noticed other apps have a yellow button that says "Purchase Product" with a blue price tag in the middle, and the top right button says "Purchase," as opposed to "Install." So if a paid app doesn't have the purchase button, how do you purchase the app?