Cannot press the start button of LE-650H2 software.
The start button becomes in grey color and cannot run.
The start button becomes in grey color and cannot run.
It seems the trial version of LE-650H2 software reaches to its limited time.
Try to reinstall the software from the CD and insert the license key on the screen.
Later, you are able to update to the latest version.
If above is not the reason, it is possible that your security software blocks the communication between LE-650H2 and PC.