Cubase 6 VST Instruments Menu - What is this X Symbol?

Hello folks,

In Cubase 6, when adding the Virus TI VSTi to the Instrument Rack, I find two entries in the menu, one with an X symbol and another without.

Like this:
[Blockierte Grafik: http://soulianis.com/stuff/vsti.jpg]

Please, what is this X symbol supposed to mean, and why are there two entries in the menu, one with an X symbol and another without?

Thank you very much for your help,
soulianis

OK, thank you Fringe. I'll check my setup.

Ok, so the "Virus TI" entry marked with X is the VST3 plugin, while the one without the X is the VST 2 plugin, right?

Thank you very much for clarifying this.

Best,
soulianis

Jörg,
Thank you very much.