My, it has been a long time since I posted. I promise I will try to be better.
Recently I was asked if it is possible to change the location of the cache file. It is, with certain minor restrictions. You can change the location by adding this to user.config:
<setting name="PersistentCacheDirectory" serializeAs="String"> <value>path here</value> </setting>
Or, when creating the GlobeControl directly, pass in a GlobeControlInitializationOptions object with PersistentCachePath set.
In either case, you can either specify a full path to anywhere, or a relative path from the current location (\AppData\LocalLow\Microsoft\Virtual Earth 3D\).
Putting the file outside LocalLow will cause problems when running in IE7/8 protected mode (Vista/Win7 with UAC on). For a WinForms or WPF-based solution, it’s fine. In such a case, the GlobeControlInitializationOptions setting is generally preferred as it will prevent problems when running Bing Maps on the same machine. On the other hand, this will also cause two caches to be written, one in the default location and containing data from runs in Bing Maps, and one in the specified location. The best approach depends on your exact usage.