Ensure you have removed all former driver per the instructions found in the manual before attempting to install this latest driver version.
After downloading the file, unzip the file into an empty folder or directory on the hard drive. (If you cannot locate the file you downloaded, use the Windows Find command to search for the Q-Stik2_v1.1.zip program on your hard disk.)
Do NOT plug the Q-Stik into the computer, and run the setup.exe file to install driver. (This program will be found in the folder you unzipped the files to in step #