With Excel 2007 I was able to use Open With to associate TSV files with Excel, so that I could double-click on them and they would automatically open with each value in a different cell. But since upgrading to Excel 2010, I can't select Excel as the program to use to open TSV files. If I use Open With and browse to the Excel.EXE and click Open, Excel still isn't in the list of programs to choose. If I select Excelcnv.EXE, then Excel shows up in the list, but I still can't open the file by double-clicking.
The best I've been able to do so far is open Excel first, then use it to open the TSV file, and then I have to do Text to Columns to break up the values. But I really want to have Excel launch just by double-clicking the file.