For me, since I was on firmware 5.17.1.0.3, I need hf support. From
Kterm – terminal emulator with embedded keyboard, I downloaded kterm-kindle-2.6-
armhf.zip which worked on my PW 10th gen. As for the USBNetwork, you need the USBNetlite package to support kindlehf firmware (any firmware 5.16.3 or later uses hardware floating point while the earlier firmware used software floating point). I downloaded that from
kindle-usbnetlite selecting the Update_usbnetlite_1.0.M_install_khf.bin package under Releases.