i thought i should share my experience to help those stuck like me.
reset ts10 to factory default and lost everything after reset including all apps and zlink5, also all apps/icons when pressed give error "not installed"
1-looked for the right firmware (look in settings/system) should be either ts10.2.2 or ts10.1.2
2-find the new firmware or same one that has same version 2.2 or 1.2 (i got mine from a telegram group someone shared earlier)
3- extract zip file on your computer and copy the files inside on the flash drive (not the folder)
4- attach ur flash drive (should be fat 32) to ur unit in car
5- go to settings and general or personal depending on software and click on system upgrade, u should see ur flash drive, tick on it and it will start upgrade and then it will restart
6- when it restarts u should have all apps and icons functioning again with new firmware
7- zlink5 will not be there and u will need to install it alone from flash drive
8- when trying zlink new update it did not work at all (u need zlink5 old version which is zlink5-dingwei-release-v5.3.21-5773ba42_jg)
9- put the apk file on flash drive and attach to unit
10- on screen go to apps and select apk installer and pick the apk file, it will install
11- now try zlink5 icon on screen in apps menu and it will work.
hope this helped, if u need the file send me a message and i will send to u.
i managed to install latest firmware version but no zlink5 to use, it's not in the apps on screen, what do i do pls and how to get it?