tsMuxeR GUI will let you remux the MKV as a TS file - Premiere Pro should import that happily enough, though long h.264 streams tend to get clunky (to say the least).
That said, it’s not clear from your posts why you need to edit it at all - tsMuxeR will also remux to a BD folder to simply burn to a disc without any messing, if that’s all you need to do.