Issue with import/export of textures.

[Thubz]

Heya,

i'm trying to remake my addon for BFA's new interface, now if u look at my addon i use Texture files to recolor the default UI.. for some reason (i had this pre-bfa aswell with 1 texture for character tab) i the main bar texture only excist out of lines with previous version i didn't mind not being able to reskin it cuz it whas something minor altho now that the mainbar has the same im kinda lost now and if i can't fix it my addon can't be updated
anyone knows how to fix this issue??

Example shot:
https://imgur.com/a/oSkgGRO

Hope anyone can trow me some magic to resolve this issue <3