Opening AutoCAD files

I am a new user.  I have a series of older AutoCAD files I wish to open and edit.  I attempted opening several files and they do open and are editable.  the problem I am seeing is that the drawing scale is incorrect.  As an example a 1"square imports a a very small 0.06" square.  Other that that, everything in the drawing seems proportional to each other.  Is there an easy way of scaling everything in the drawing up to the correct size?

For scaling use "Select - Select All", then "Modify - Scale", specify the reference point, and type in the scaling factor at the input field appearing. In your case you can type "1/0.06", expressions are accepted.
If you don't know the absolutely correct scaling factor (as you may have taken the value for the small rectangle from a measurement that has been rounded), I don't know a solution. Sadly you can't yet scale via from one point (one corner of too small rectangle) to an other (where the corner should be) like in other CAD systems.