How to disable built-in hotkeys in Express Scribe for Mac?

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Is there a way I can prevent individual built-in hotkey settings from working?  I normally use Cmd-[right arrow] and Cmd-[left arrow] to jump to the end or beginning of whatever line of text I am typing (eg in MS Word).  But if I do this in the transcription notes window of Express Scribe Mac, it moves the current position pointer in the audio to the end or beginning, losing my place.

I tried creating new key combinations for jumping to the end or beginning of the audio in the Preferences, which work fine, but they don't prevent the built-in hotkey settings from doing the same.

I am using the latest version of the software under MacOs Mojave.

Thanks