@litadmin 

The only way to reset the software is to uninstall completely and reinstall it. Do not keep any old user data when uninstall it.

see this forum link on how to uninstall :

https://community.tp-link.com/en/business/forum/topic/240904

credits to vlad, for when the link might not work anymore , this is what he did :

remove omada package (it will remove dependencies as well, you may also need to run with --purge option):

dpkg -r omadac   ( I edited this to ad the c )

list the packages (ensure omada package is not there):

dpkg-query -l | less 

install the new package:
dpkg -i omada_v4.2.8_linux_x64.deb

install all dependencies:

sudo apt-get -f install

I did this with 4.3.3, after I made a password cut and paste error (I guess) and was good to go after a reinstall.

I did replace all the "omada" for "omadac"