Are you sure both the theme files you want to keep are still in the Java directory? Also, can you show a screenshot of where it wants to delete the themes you want to keep? Oh, and make sure your BlackBerry.alx file does not have Vendor IDs in it. Since the latest OS release is from Vodafone and you want to use a T-Mobile theme, you need to either remove the IDs or download the BlackBerry.alx file that was included in the new OS thread.