Wish IDE Shared+Files Path [Resolved, use %ADDITIONAL%]

ref:

I would like to use an environment variable or IDE construct to access the compiletime.jar in the CustomBuildAction, so the same exact CBA line can be in any project on any computer I use despite installation/setup path differences.

Is there a mechanism to reference the IDE SharedFiles path in a CBA that isn't an absolute or relative path, that the IDE supports? I'd rather not implement my own environment variable, or pop it into JAVABIN.
or similar.

The following does not work.

Error: Unable to access jarfile %JAVABIN%\compiletime.jar
Also tried running B4A as administrator.

Also tried

Put the jar in the additional libraries folder and use %ADDITIONAL%

Thanks. Given that, I found these, which list more %% vars.
https://www.b4x.com/android/forum/threads/b4x-comment-links.119897/
https://www.b4x.com/android/forum/threads/comment-links-with-date-and-time.132262/#post-834861

However when I tried %ADDITIONAL%
The compiler fails with
If I swap in the full path, it does work.
Going back to -jar %ADDITIONAL%\compiletime.jar; if I put the jar in the B4A subfolder of the additional libraries folder, it still errors.
Checking file properties on the jar there is a security notice, which I unblocked, but still doesn't work.

I also tried %B4X%, same error.
And even %PROJECT% gives the same error.
It would seem the environment variables do not work in that CBA parameter location, or I need more help. Only filesystem paths are working, including absolute and relative paths. The following does work, with the jar in the project folder, as does the full path.

1. First step is to upgrade to latest version of B4A.
2. The correct way to run jars is:

This way it will work with all versions of Java.

Thank you for your time.