Log into AppWorld by going to the MyWorld icon and logging into your account. Also, try removing the SIM card from your phone. You should be able to see the paid apps again. RIM is aware of this issue and is working towards a resolution, but for now, this should work for you (assuming your on a Verizon/Telus/Bell Storm).
Posted from my CrackBerry at wapforums.crackberry.com