Good news! We finally have a way of clearing watermarks from your NewBlue VEGAS Pro 14 plugin bundles in VEGAS Pro 15! Here are instructions:
Copy the XML file and paste it in C:\Program Files\NewBlueFX\SKU (overwrite the XML of the same name).
Sign out, then back in to the NewBlue Application Manager.
Restart VEGAS / Titler Pro.
Afterward you will be able to use your NewBlue Vegas Pro 14 bundle plugins in VEGAS Pro 15!