I'm not familiar with this addon but you should just be able to......
FYI - If you have anyway to create a restore point now's the time to do it!
Click on Start
Click on Run
In the dialog box that opens type:
regsvr32.exe msstdfmt.dll
Then click ok.
If this doesn't work type:
regsvr32.exe then the full file path to msstdfmt.dll (i.e c:\windows\system32\msstdfmt.dll)
If all is successful you should get a popup window saying that the dll is registered.
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