In that case a plugin function was renamed and Realbasic linked an app which tried to load the old function from a new plugin file. Schema editor no longer enables the delete column contextual item for dbs that do not support drop column such as SQLite. After caches are cleared, a MsgBox is displayed to indicate it finished. The Chilkat Spider component has disk caching capabilities. Go to the folder ~/Library/Caches/Realbasic (~/Application Support/REALbasic 2006/ for REALbasic 2006) by clicking through the folders or using the 'Go to folder' menu command. To setup a disk cache, create a new directory anywhere on your local hard drive and set the CacheDir property to the path. For example, you might create 'c:/spiderCache/'. The UpdateCache property controls whether downloaded pages are saved to the cache. Move all stuff inside this folder to the trash. Go to the folder '/Documents and Settings/ username/Application Data/REALbasic' on an english Windows or '/Dokumente/ username/Anwendungsdaten/REALbasic' on a German Windows by clicking through the folders Xojo's picture cache On MacOS the Xojo picture class implementation for an editable picture uses both a CGBitmapContext for the pixels and a CGImage for drawing it. You find the REALbasic folder with the caches in your user folder.