Viking, are you trying to run a texture you made in the learntomod texture editor, in your learntomod world on minecraft?
If so, what you do is after creating it, just press the grey deploy button at the top of the editor page (to get there, go to the texture editor, mouse hover over the file you created and select edit and then save changes then press Deploy at the top of the page). Then, put a change texture block inside a 'main' function and type 'Viking-NameofTextureFile' into the block. Then, go to the server admin page and get a new ip by pressing the start server button. When you're successfully transferred to your world, press the mod button on the page,