[SOLVED] Resizing all existed thumbnails
 

Recently ive found big problem with facebook "ög" tool.
Ive made my all thumbnails for 900 posts in resolution 190x107----...
But facebook just dont want to accept thumbnails under 200x--- px!!!!!!
Now o have to resiza all my 900 thumbnails to 200x---
How can i do it without going crazy and throw the pc from the window?
I need massive sulution...
WP 4.1.1
Atahualpa 3.7.23
p.s. i tired to just enter the value 200 in ATO > Thumbnail Posts - nothing happend.
I can rename the files in var/www/site/....icons but its not a solution for 900 posts!!

Solved!
Using the "Force regenerate thumbnails" plugin.