FYI: I'll release later today a new version of PowerTools containing all the fixes of the latest test build, but without the almost-working x64 support. Instead, the entire support for 64 bit registry view will be disabled, this should be a rather fail-safe option (i.e. the new version can be safely used with 64 bit Windows, it just doesn't analyze the entire registry).
The reason is that the x64 support may still take a few weeks to get right, I see no reason why the other users should wait this long for the updated version (with many other bug fixes and improvements).