"Update Failed" - from Rev Enterprise 4.0.0 to 4.5.0 dp 3

[Flavio64]

I need to work on a XP pc, when try to update rev enterprise 4.0 to 4.5.0 the download work, unpacking work then update stop at "Updating..." level with "Update Failed" message. In "Manage Versions" there is the 4.5.0 but if i choose it Runrev ignore this change and don't restart or restart with the 4.0.0. Runrev on my Mac don't have this trouble. What can i do ?
Thanks
Flavio

[Flavio64]

Solved. I use the Windows unistall to remove the 4.0.0, now the 4.5.0 dp 3 start. In windows unistall i found 3 times the 4.5.0