Updating koreader broken

Hello
First of all, sorry for bad english.
Second, great job all developers. Thank you very much.

I installed koreader in PW.
I had backdoor ota locked with this
So, I connected PW to wifi, and looked for updates in Koreader.
I then updated, but ... at same time (yes, I know was my fault) I was installing block ota updates with this.

So ... While koreader was updating, the script blocking ota updates rebooted my kindle...

And koreader disapeared from kual. I tried deleting koreader directories from / and extensions and copying it again, but nothing happens.
I think I have to do something like "clean uninstall" to reinstall it again.

Anyone can help me ?

I have kterm installed, can execute commands. I have some basic linux knowledge.

By the way ... how can I enable ssh access over wifi?

Thank you very much.