Hello,
Are you sure it's related to my addon? Last version was released a week ago.
If your tabs got closed, it shouldn't be related to this addon at all.
But you should be able to restore your closed tabs with "Ctrl + Shift + T" or "Ctrl + Shift + N" to restore closed windows.
You can also contact me to my support email.
Best regards,
Juraj Mäsiar