Well, I have to admit that I am a bit stumped as to why connecting a new wireless mouse prohibits me from opening active on-going projects in the latest Logic 9...:eeek: But I can open brand NEW Logic sessions via my templates... Any one out there with driver compatibility knowledge, please step forward... I needed a new mouse, I looked around & purchased a Logitech Performance Mouse MX after reading generally favorable reviews etc. This Logitech mouse is wireless and connects to the computer via a small usb "dongle" using something called 'Unifying' technology. (This isn't Bluetooth, it's some proprietary wireless communication that Logitech developed.) Upon opening Logic, the initial splashscreen appears and all the drivers seem to load as they always do. The window pops up asking if I'd like to open my most recent project etc... I click ok. Everything loads until it gets to the AU validation of my Soundtoys Phasemistress plug. This is when I see an error I have never seen before in Logic: http://www.logic-users-group.com/forums/attachment.php?attachmentid=596&stc=1&d=1330788987 I click ok and am presented with Logic's Templates menu. When I choose a new template to load, the crashed Logic progress bar stays up and Logic does not function. Most features and functions are greyed out. I cannot Quit Logic as shown here; http://www.logic-users-group.com/forums/attachment.php?attachmentid=598&stc=1&d=1330789209 I must force quit every time. Logic opened fine (same project,) earlier that day. The only thing that had changed since was the installation of the Logitech Mouse software and this physical dongle. To troubleshoot, I disconnected the mouse entirely and used my wife's Apple trackpad to navigate and was able to open Logic and even instantiate a Phasemistress plug-in with no issues. Any input is appreciated.