hi Rick,
It tries to remove the 2.63 and install the 2.64.
It stops, gives the message
A network error occured while attempting to read from the file
C:\Program Files\Paint.NET\Staging\PaintDotNet_1477935322.msi
and when I press OK, the program 2.64 is uninstalled automatically, and I go buck to 2.63 again.