PDF24 assistant displayed to another remote desktop session

why PDF24 assistant displayed to another remote desktop session?

I have been using PDF24 for years. Currently I run PDF24 3.5.2 on Windows 7 Ultimate with remote desktop enabled. I kept multiple remote desktop sessions all with my user account. Then when printing to PDF24, the PDF24 assistant always printed to another remote desktop session firstly. After I tried to print several times, the PDF24 assistant showed up in my current remote desktop session. It seemed PDF24 assistant walked through the sessions, and displayed the dialog box on each of them. Could you help? My email is bigjumpfish77@live.com.

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