AutoCAD Mechanical

[#1]

I have version 2013, I just upgraded not long ago and every single time I open a file it gives me a warning dialogue box that says this file is read only or in use do you still want to open it. It is driving me nuts!!! I know I can go in and change the settings and change that, but every single time? Is there no way to "undo" something in my settings to make that permanent? 

[#2]

Hi,

Will this link below give any help on the problem?

http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=2865666&linkID=9240617

[#3]

We just started using 2013 today, and ran into this problem.

Is ther a way to manually delte the lock files? (.dwl)