Suddenly a problem occurred when I try to open an Excel 2010 xlsm file by double clicking on it. I can open the file from within Excel but not by double-clicking on it. I tried the usual suggestions such as:
Unchecking File->Options->Advanced->General->Ignore other applications that use Dynamic Data Exchange (DDE)
Open With Excel, checking 'Always use the selected program to open this kind of file'
excel.exe /unregserver and then excel.exe /regserver
I repaired the Windows XP and reinstalled Excel.
When opening it from within Excel I saved it under a different name.
Nothing worked. Also, took a look at the questions in experts-exchange concerning this issue and didn't find the answer there either. Something is wrong with the file association but I don't want to solve that by making a new profile. Do you have an idea how this problem can be resolved?