This is because it's using the older TK 8.6.10 which is used in 0.51-4. However, it has a number of GUI issues which are fixed in 8.6.12... 

On Nov 11, 2021, at 1:53 AM, Philip Stone <pkstone@ucdavis.edu> wrote:

This build not only fixes the soundfiler read issue, it also does not exhibit the ‘stuck flash’ behavior for buttons, messages, etc.

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Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com