Check to see if you (accidentally) installed PM 4.5.2 into a separate directory and you are still clicking the 4.5 icon.
Assuming Windows: have a look in C:\Program Files\Camerabits, you'll probably find you both have a PM 4 and a PM 4.5 directory.
Hope this helps.
This is true ... how did that happen?
I will uninstall and reinstall 4.5.2.
Thanks.
When you install the software, it asks for the directory where to place PM in. Between 4.5 and 4.5 I think this has changed. So the install of 4.5.2 did not overwrite 4.5 as you'd expect. This resulted in both being still around.
I think uninstalling 4.5 would solve the problem too. But to be on the safe side, remove all PM versions.
(remember to remove any files from the PM directory in "C:\Program Files" as well.
Cheers.