Applying and managing themes

I have created a Storyline Theme with five slide masters, each with two sub-slides. I saved the theme to the correct location and it appears it my design options, however, when I click on the theme or right click and select, "Apply to all slide in course" the slide still adopts the blank design. I cannot get my design to apply itselfs to projects outside of the original .story file I built it in.

Any tips or information is appreciated!!! Thanks

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