NETGEARGenie Desktop App version 2.4.22 keeps crashing on macos/OS X ((R7800 router))

Setup:

NETGEARGenie Desktop App version 2.4.22

Macbook Air (2017)

macos Sierra (10.12.6 (16G29))

Network router: R7800, Firmware: v1.0.2.28

Symptom:

NETGEARGenie Desktop App keeps crashing after some period while running in the background (as required for AirPrint access to a USB printer attached to the R7800 router).
The app itself works OK for interactive use--configuration, etc.

Notes:

1) crash reports of course available on request (any hints which parts of the report to post here would be welcome, too!)

2) The app was freshly installed on a new Macbook Air; the crashes persist across system restarts and full shutdown & reboot.

3) this version of NETGEARGenie crashes in the same fashion on an old setup consisting of a white plastic Macbook ~2008 running Snow Leopard 10.6.8 -- but that of course is an unsupported configuration.

4) I was the similar thread from 2016 (posting by  juliegoldfinch, ‎2016-05-01 10:55 PM), but that thread was closed without any feedback from the user…