The effectiveness of the QUOSA software is dependent upon frequent software updates.
When there is a new version, your software will update automatically when QUOSA is open but idle.
To ensure that this happens, close (rather than shutdown) QUOSA when you're not using it. Do so by clicking the red X in the upper right of the window, or by selecting File > Close.
The QUOSA icon will continue to display in the system tray in the lower right corner of your computer screen. To re-open QUOSA, simply click on the icon.
If you need to completely shut down QUOSA, go to File > Shutdown QUOSA.