Hopefully, that's an Installer issue which will be fixed when Prolific sprinkles their magic fairy dust on the program after my part is finished.
What I'm more concerned with is the report of multiple instances of the program running. There's a built-in safeguard against this, called a Mutex object (mutually exclusive). Before the program launches, it uses this to make sure there is no other instance already running. If there is, it's supposed to switch the Windows focus to that copy, and not launch a new one.
If I understand the situation, some of you are reporting that there may be ways to defeat this feature by entering and exiting the program in unusual ways - through Display Properties, for example.
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