Hey Cylon,
first of all, thank you for the purchase!
While uploading an image into a field in the Theme Options panel, please make sure that in case the „File URL” field displays an attachment URL (ending with „?attachment_id=xx”) or an empty field, press the „File URL” button below the url field so that the link is a direct url of the image file (ends with the filename of the uploaded file). Once you have chosen the item and settings, press „Add to OptionTree”. Please let me know if this solves the problem!
Sincerely,
Andrii / Satori Studio