new PATH isn't showing up in new console

Solution 1:

When you start new console - it inherits environment strings (%PATH% also) from parent process (ConEmu).

When you change %PATH% in your shell - it applies to this shell and its children processes.

If you need to fixate this temporarily environment changes - you may execute

ConEmuC /export PATH

This will "copy" your current %PATH% value to ConEmu GUI and it will be applied to all new ConEmu's consoles.

BTW, why you not tag your question with "conemu"?

Solution 2:

You need to put that PATH setting command into your .bash_profile or .bashrc file. Just setting it at the command prompt only does it for your currently active shell.