Just create new timeline settings and the additional tracks should be gone.

https://bryancolvin.com/tools/?fbclid=IwZXh0bgNhZW0CMTAAAR3kimxBgDYrW8DeKnaJ7gEbP-6cW-g6QCjUpUui0eCct2nCPU-yNgZ8vEg_aem_AYsicDQUYaecAGfApyjt8KA5OC2Esf4RjN4vEMk-feXUtc9pjbTbMV-gymsgbQYZyY0aQIcNi3c3Bn_WhPh7ZpSV

Have you tried going online, signing out of Avid Link and signing back in again? If you're still stuck, email ajay.yumul at avid dot com.

[quote] .just be aware the footage is stretched if you make it it 1920x1080[/quote]Not necessarily. In the bin, choose add column, choose to add Image Aspect Ratio, then set that to 4:3 or 16:9, depending on the source's aspect ratio.

Direct exports from MC have been excellent and quite fast since the new export engine in 2020.4. Export to ProRes, DNx, h264 or h265 in MOV, MXF or MP4. H265 with a hight bit rate should be great for Vimeo. Also: Squeeze has been awful for a long time. Shutter Encoder, shareware developed by an editor, is fast and excellent.

ProRes or h264 from MC. Fast and great. QTref was a good thing back in the QT7 days. Ever since 2020.4 or so, MC's own mov/mxf/mp4 export module has been great.

Right-click the Project and choose Refresh. Does that make them appear?

You should see a Link button at the top of the timeline. It lets you toggle between locked segments and unlocked segments. If you don't see the button there, you can open the command palette and search for it there. https://youtu.be/B_nLoC3Fu84?si=R50l4Onk-Zo67gry

[quote]How do I now download Media Composer 8.4.0.[/quote]You'll need to find someone who has that installer for you.

[quote]...the latest version of AVID is NOT compatible with Apple's M4 chips. Is that correct?[/quote] The latest versions of MC are qualified for M4 Apple Silicon, see the current version matrix .