Might want to wait a bit on the 3.173 update...

[Grandpa David]

The version update doesn't seem to be
picking up the registration data from the
earlier version installed on the computer.
Tried it twice and 3.173 continues to say "
This product is not registered."

[X10 Pro]

This appears to be a display problem in the
About dialog and splash screen, and shouldn't
affect the operation of the program. I've
backed off the update and we should have this
fixed very soon.

[Jim01]

Get the same thing, hopefully there be a new
update to fix?