I’ve been using Dragon (v30) for four days now – I’m impressed, but need some help with cache management. I use a SSD with limited capacity for the root drive (C: in WinXPPro SP2) so cannot afford much space for the cache. With Chrome there’s a registry hack to move the cache and limit its size. In HKEY_CLASSES_ROOT\chromeHTML(dragonHTML?)\shell\open\command:
Right click the Dragon shortcut, select properties and the target field is under the shortcut tab.
AFAIK registry hacks are no longer required like was required for earlier versions.