I would suggest trying the Beta release version from here https://www.picoauto.com/download-software.html, look carefully for the words Beta Release in the middle of the screen and click on them. If it still rolls back it may be a windows permissions issue which will require some more detailed investigation
i have tried both beta and stable versions and get the same, puts desktop items on the desktop, then states in the install program "rolling back action" and the install progress bar goes in the wrong direction and removes the software and icons
I had this once and i seem to remember that i uninstalled the current version i was using then did a reboot. After that i installed the newer version. Not sure if its the same problem for you but might help someone.