I currently have 3 Vbars in a TDR, Logo 600, and Rave 450. I have Vstabi 5.2 on my computer. I bought another Vbar for my new Protos 500. It is a Mini Blueline Express 5.0. I have an HP notebook PC with Windows 7. I have been using this PC with the first 3 helis for about 3 years total. When I tried to connect the new Vbar and upgrade to Pro I must have done something to the computer because now it will not connect to any of my Vbars. I tried them all in frustration. I did see a message saying the device was not installed correctly and the computer cannot find the drivers. I see the yellow exclamation point for the Vbar in the device manager display. I then installed Vstabi 5.0 from the disc included with my new Vbar but it does not connect either. Thank you