I have recently downloaded and installed AVR Studio 4.19 build 730 and had some initial difficulties with it locking up when I "Select Platform and Device", but a post in a forum led me to fix that by downloading some sort of .xml file. I can now Build and Run and step through my old programs just fine. I was also able to find a rolled back Jungo driver that fixed my problem with an ICE50.
My problem is with the AVRISP mkll. Device manager looks like what's immediately below when the mkll USB cable is connected to the PC. But if I select the AVRISP mkll Upgrade in the AVR Studio Tools menu and apply the jumper to get the LED to blink orange/red, AVR Studio says Error: No AVRISP mkll in boot mode found... And when I select Program AVR and Connect AVRISP mkll USB, I get the "Connect Fail - Select AVR Programmer" message at the top of the return of the "Program AVR" screen. I'm guessing there's some sort of problem with the USB driver?
Your help would be appreciated.