Depending on how often you're going to use a stem splitter, it might be worth just upgrading BiaB to 2025. You don't need to buy an expensive upgrade - get the Pro version upgrade for $79 and then just install the program. It will work with all the realtracks etc. from whatever level you already have. I've been using the stem splitter in Realband 2025 and it works really well - way better than anything else I've tried.