Operating system is Win7 64-bit, Office is 2010 64-bit.
When I double-click a Excel spreadsheet (.xlsx, .xls, .xlsm, doesnt' matter which) in Windows Explorer, Excel will open that file, but together with a blank workbook. I tried opening it by pressing ENTER, so it is not a mouse problem.
It is super annoying.
I searched and most solutions mention the XLSTART folder in AppData\Roaming, but for me this settings has never been used, the folder is empty with no hidden files. I tried removing the whole folder too, with no effect.
I tried launching the spreadsheet from commandline: Excel.exe "file.xls" and this launched Excel with only the file mentioned.
So I guess the problem lies in the file association. I tried changing the default program for .xlsx to something else, then switch back, but that has no effect.
I also tried using Office repair, but that's useless too.
How can I fix this problem?