Force .text to open in Excel
C:\WINDOWS\system32>assoc .text=tabdelimtext
.text=tabdelimtext
C:\WINDOWS\system32>ftype tabdelimtext="C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" "%1"
tabdelimtext="C:\Program Files (x86)\Microsoft Office\Office16\EXCEL.EXE" "%1"