Dimension Pro reinstall problem...

Dimension Pro has been bundled as a separate installer for some time now. No prior installation is necessary. Use the installers from one of the X series versions of SONAR. The X3 files are:
04_Dimension_Pro_1_5_Setup.exe
04_Dimension_Pro_1.5_Expansion_Packs.zip
 
If the installer is complaining about a prior version, make sure the registry is clean. DimPro entries are
64bit - HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\dp
and
32bit - HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cakewalk Music Software\dp
 
Prior to v1.5 DimPro used HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\Dimension Pro I am not sure but would expect there may be a 32bit location in Wow6432Node for older versions too.

The removal of leftover registry keys is a common 'gotcha' kind of thing, and also frequently trips up folks trying to do clean installs of Sonar, so don't feel bad.
 
The other common 'gotcha' with an installation of Dim Pro is that on first launch, to complete the registration process, you need to either launch Sonar with the explicit Run As Administrator, or you need to launch the stand-alone Dim Pro with the explicit Run As Administrator, or it will not properly detect the registration code.  
 
Please note that Run As Administrator is not the same as having your User account in Windows set up to be an Administrator account.  Right-click on either the Sonar launch icon, or the Dim Pro launch icon, and then click on Run As Administrator, and then you can properly complete the registration process.
 
Hope that helps, 
 
Bob Bone
 

I run all installs of trusted applications with Run As Administrator, so I don't really have the issue of forgetting that.  I have done it so long that way that it is second nature - actually it's first nature, to be more accurate.
 
When things are compressed (zip, rar, whatever), I always decompress them prior to installation.  it too is a choice I made long long ago, and it has served me well over the decades.
 
Bob Bone