Corrupt Excel File when downloading Import template or Exporting Assets.

Whenever I try to down load an Excel document, to either export assets, or down load the import template.  The template (.xls) downloads.  But when Excel goes to open it, I get a message in Excel saying that the file is corrupt and can't be opened.  The TSV file downloads and opens with no problem.

I'm running Web Help Desk v. 12.4.1 - Build #12.4.1.983

I'm running Excel 2016, on a computer running Windows 10 (1703).