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We have upgraded from QGis 1.8 to QGis 2.2. Qgis 2.2 is first installed, then 1.8 removed. Since then it is impossible to open .qgs-projects directly from windows explorer. We have checked explorer, file extensions and relinked to C:\Program Files\QGIS Valmiera\bin\qgis.bat . But it doesn't help.

We get the error 'qgis_core.dll cannot be found, please reinstall'. But that is rather drastic.

I use windows xp.

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The file association is a bit crude under Windows 7. It does not like the association with a .bat file, and grabs the qgis-bin.exe in your case.

There are several file associations stored in the registry, which can not be easily accessed from the explorer menu, as it was under Windows XP.

You find the key under

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.qgs\OpenWithList

If you remove all .exe associations from the list, the .qgs should be opened with the bat.

You may find a few utilities here:

https://superuser.com/questions/136133/how-do-i-set-advanced-file-associations-in-windows-7

Or reinstall QGIS 2.2 in a new folder.

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  • I have the same issue as listed, but on Windows XP, with the same error warning. It's not a Windows 7 only issue. – Tim Couwelier Apr 24 '14 at 9:36
  • Try to remove the .exe association from the registry, as I explained in my extended answer. – AndreJ Apr 24 '14 at 9:48
  • I did manage to solve the problem with removing the .exe associations in the mentioned registry-key. On XP. Thanks Andre! – Filip Mahieu Apr 24 '14 at 11:28

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