Where does Harmony keep Toon Boom Template thumbnails on my PC?

I’m curious to see where Toom Boom Harmony saves template thumbnails on my PC.
I have been templating character walk cycles that take 10 minutes to generate thumbnails.
No matter how small the change I made to these templates, Harmony have regenerate these thumbnails.

As long as I know where these files are saved on my HDD, I can make a back up of them and restore after I update my templates.

It will generate the thumbnails in a “.thumbnails” folder inside the .tpl folder.

So the contents of “myCharacterTemplate.tpl” will look something like:

.thumbails
elements
environments
frames
jobs
palette-library
PALETTE_LIST
scene.aux
scene.elementTable
scene.xstage

go inside .thumbnails and you will see it will have .png files named like:

t-0001.png
t-0002.png
t-0003.png

I’m not sure if there is any way to avoid the time it takes to generate the thumbnails without custom tools tho. Every time you want to update them it will re-render them all in frame order.