The link to Ears 1.4.5 pinned in #bta-discussion in the Better Than Adventure Discord Server leads to a 404 page.
The link to Ears 1.4.5 for BTA on the CurseForge page leads to the same 404 page.

I decided to try installing 1.4.4_01 in my MultiMC instance of BTA instead. I followed the instructions and verified that the MultiMC log has the ears line in it, but my slim-armed skin is still showing up as a regular one.

Here is the jar file in the instance root (after I renamed it):

Here's the extra JVM argument

Here's proof it initialized from the output log:

And here's my slim armed skin in-game:

Here's how my skin should look on NameMC:
(Note: My skin does not use special Ears stuff, I wanted Ears as a skin feature backport.)

[P.S.: apologies for the large images, I don't know enough markdown or HTML to know how to resize them...]

All of the Ears retrofork ports are currently broken due to major changes in the mods, and I've not had a chance to update them.

The BTA port got renamed to the "Vanilla b1.7.3" port due to the changes in BTA, but it still working under ModLoader/vanilla b1.7.3.

I see the last interaction on this issue was quite a while ago. Is there a fix still planned? BTA recently received a pretty major update and playing without this mod kinda sucks.