It was replaced by a modern Qt GUI in v30+. The new GUI has the same mkvmerge engine – just a different look. 🔗 Direct Download Link (for convenience) MKVToolNix v74.0.0 (64-bit) for Windows 7 👉 Download from FOSSHub Always verify the file hash if security is critical.
No. v75+ dropped Win7 support. Stick to v74.0.0.