STL FILES not usable in 3D Printer

I have used Shapr3D for several years to create STL files that have been use din several makes of 3D printers. Today I am getting files that printers and text editor are not recognizing. Have ASCII selected as type of file. Here is screeb iffile I am getting.
Wrench in Shape.shapr (34.8 KB)

I just tried it on my Mac and the file I exported is human readable. Simplify3D imports it successfully. I’m running Shapr3D 5.660.0.