Maxim,

Trashed that folder and restarted autoCAD and got this error message.  See screen shot attached to this message.

This is getting very frustrating and I am now way behind in my work.  

I have installed Draftsight which is incredibly similar to AutoCAD, has a low learning curve due to that similarity, it is totally free and runs very well on Yosemite.  I have to use that to catchup on my work and cannot spend anymore time on trying to get AutoCAD LT to work on Yosemite.  My recommendation to anyone else in this forum that has a similar problem with AutoCAD LT not running on Yosemite is to go to the Draftsight web page and download Draftsight 2015 for mac.  You can use that program to get your work done until something comes along to fix this rediculous lack of customer service by Autodesk.

http://www.3ds.com/products-services/draftsight-cad-software/free-download/

Thanks for all your efforts, Maxim, they are much appreciated BUT I have to get my projects taken care of.  Maybe once I catch up I can spend more time on getting this situation corrected.

Again, thanks for all your hard work.