Bad model file, UNIHIKER K10.

I searched the forums and did not find anything on a bad model file (DFR0992.stp) that is the case for the K10 that I would like to print.

The link on the DFRobot wiki for the K10 case is:

https://www.unihiker.com/wiki/K10/HardwareReference/img/hardwarereference_onboard/UNIHKERSTPModel.zip

When downloaded it is:

UNIHKERSTPModel.zip

When unzipped it is:

DFR0992.stp

When Bambu Studio or Creality Print open the file they both get an error saying:

“The file does not contain any geometry data.”

"Could not read ‘C:\Users\keli\Documents\UNIHKERSTPModel_1\DFR0992.stp’

Both slicers are supposed to read “xxxx.stp” files, and it can be opened up with Notepad++. I don't know if the text inside is typical .stp stuff, I'm not used to looking at the .stp format.

 Could someone point me to where the “good” file for the K10 model case is.

Thanks Jerry Anderson