I'm running AutoCAD Civil 3D 2011 and 2012, both as C3D and AutoCAD on a 64 bit windows 7 computer.
I worked in both applications yesterday and this morning successfully installed CadTools Build 660. After the installation I can't start AutoCAD any more, in 2011 (both C3D and vanilla) shows the normal start up for about ten seconds and then just disappears without any message boxes or further information. In 2012 (both C3D and vanilla) it goes through the normal start sequence and then pops up a message box saying it can't find the Softlock Licence Manager, after clicking the OK button it just closes down.
I deinstalled CadTools and rebooted, but the problems just persist. It's a serious problem as I can't work any longer in AutoCAD.
Has anyone had any similar experiences or know what the problem is.