CHIRP

I'm new to this. The download guidance says that you do not have to delete/uninstall an old version of CHIRP when attempting to download a new updated version. I have tried that over the past couple of updates and I get many many errors during the download and install, and then when I try to use the CHIRP program, it doesn't work properly and locks up. When I downloaded the very 1st it seemed to work, but for all updates it causes problems.. Then I have to uninstall and delete my current version and download the newer version and then is seems to work OK. Am I doing something wrong? Or are there any optional suggestions?