If it didn't help:

Roll back the old folder - rename it back. 

 
Option #2 or #3
https://everhelper.me/help1.php

Unfortunately, you can't keep older version for a long because new FF57+ will automatically disable it. There is nothing we can do, that's how Firefox team implemented. 
We try to fix everything that is possible.

Highly recommend using EverSync to backup your dails.
https://addons.mozilla.org/en-US/firefox/addon/fvd-synchronizer

Thank you.

напишите на емайл team@nimbusweb.co

Приветствую

у вас после обновления все дилы пропали? EverSync использовали?

Мы можем попробовать http://teamviewer.com/

Hi,

We launched update couple hours ago. Update extension to the latest version:  62.8.5 or Higher
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

This is the simples option, not always help but we encourage to try. 

- Copy and paste in address bar about:support  
- Select following http://nimb.ws/Vm5pjy 
- Rename this folder to any name and restart Firefox http://nimb.ws/awxfuW BUT don't delete it. Just rename it, for example Storage_OLD

Here is VIDEO
http://nimb.ws/XrkKQ2

If it won't help, let us know.

Ok, we will check.

Приветствую

уточним этот момент.

Hello

Do you have same problem on Firefox for PC?

Hello

Please tell me name of program.

А какая версия Firefox?