I certainly did try the normal procedure for associating filetypes. Many times! As I posted in http://forums.doublecad.com/index.php?topic=1182.msg5509#msg5509
DoubleCAD v1 continued to own the right-click function even after I had installed v2.
When I uninstalled v1, I was totally amazed to find that the procedure that has always worked with every program through many versions of Windows absolutely wouldn't work to let me change that v1 association to DoubleCAD v2! I could select "Choose Default Program", and navigate to the new doublecadxt.exe file, and nothing at all happened, the Windows list of possible programs remained blank. I'm still convinced you have a bug there!
When you say, " I was able to associate .DWG to DoubleCAD XT v2 with no problems and I have DoubleCAD XT v1, v2, XT Pro v1 and V2, and even AutoCAD 2009, 2010 installed on my machine", how were you able to select between v1 and v2?
Are you saying that if I'd tried to "Choose Default Program", and navigated to the folder with version 2 of the doublecadxt.exe file _before_ I uninstalled v1, I could have changed the association from v1 to v2? I certainly couldn't after I had uninstalled v1!
There is only a single registry key
that can be associated with the name "doublecadxt.exe", and since both versions use that same name, there can only be one right-click association at a time.
You may be right that one could switch it between v1 and v2 while both are installed. After I had uninstalled v1 using the Windows "Programs and Features" control panel, that association function was totally broken.
I did not realize you were offering free phone help for install issues! That's unusually generous. I figured I might as well "go it alone", because none of my original forum questions about the maddening problems I encountered with v1 had produced any answers in over a week. http://forums.doublecad.com/index.php?topic=1342.msg5397#msg5397
I decided to try the v2 version before giving up on DoubleCAD entirely.
I now understand that if the default box shows something like "2.02 in" and you want to change it, you must type something like "2.04in" without the space to avoid an unwanted commit of your object. (Not sure how we are supposed to know that, but then I've never used real AutoCAD, only Mac CAD tools and AutoCAD clones...) I'd never seen a program where you were required to enter the units if your number was already in the default units, and v2 doesn't seem to require it, but v1 certainly produced bizarre results if I didn't.
I spent hours searching the forum and the web, reading the help and even brute force searching through the entire pdf for every instance of relevant words, and universally found help revealed the obvious and neglected such critical details. Maybe my problem is never having learned habits that all AutoCAD operators take for granted? My background is MacDraft, Claris CAD, and for many years now, VDraft2.2 on Windows. Not exactly mainstream...