How to set Indesign CS5.5 as default instead of CS4 and Vice Versa (PC Version)

I was having a problem with Window 7 (64-bit). I have both Adobe InDesign CS4 and CS5.5 install and all InDesign files would open automatically in CS4, which was extremely annoying. I found a way of changing the default programme to CS5.5. The regular way, right click the file, open with, choose default program and then finding the CS5.5 file didn’t work. This is because both CS4 and CS5.5 application files are called indesign.exe and Win7 can’t differentiate between the files, so here is the solution:

Changing default from InDesign CS4 to CS5.5

  • Open Run (Win button + R) and type “regedit” and hit okay then yes
  • Locate HKEY_CLASSES_ROOTInDesign.DocumentShellOpenCommand in regedit
  • Change the value of (Default) attribute to 
    “C:Program Files (x86)AdobeAdobe InDesign CS5.5InDesign.exe” “%1”
    (include the quote marks)

Changing default from InDesign CS5.5 to CS4

Exactly the same as above except:

  • Change the value of (Default) attribute to
    “C:Program Files (x86)AdobeAdobe InDesign CS4InDesign.exe” “%1”  (include the quote marks)

I came across this solution on the Adobe Forums site.