Quote from the RC Astro web site:
BlurXTerminator, StarXTerminator, and NoiseXTerminator will very soon no longer be dependent on PixInsight or Photoshop. The new stand-alone RC-Astro command-line interface (CLI) tool will soon be available for beta testing.
Stand-alone, independent of any particular host application
Easily integrated into any application, or use it from a terminal
Works on Windows, macOS, and Linux
Expands Windows GPU support to AMD and Intel
Existing licenses honored (no additional cost)
Free to download