Although I don't currently have JMP Pro 13, I suggest you try a script which you can add to the data table (see below but substitute your y and x variable names and the type of Oneway if you are not running All Pairs before running the script). You can set the preferences for all 6 Oneway Means Comparison and also remove the Comparison Circles in a separate command. The latter Comparison Circles can be accessed from the report's topmost Oneway Analysis hotspot (red triangle) Display Options, Comparisons Circles. Just uncheck the latter. If none of these work, I suggest contacting the JMP Tech Support (JMP Technical Support <support@jmp.com>). They are very helpful and responsive.
Platform Preferences(
Oneway Means Comparisons(
Difference Matrix( 1 ),
Confidence Quantile( 1 ),
LSD Threshold Matrix( 1 ),
Connecting Letters Report( 1 ),
Ordered Differences Report( 1 ),
Detailed Comparisons Report( 1 )
));
Oneway(
Y( :yvariable ),
X( :xvariable ),
All Pairs( 1),
Comparison Circles( 0 )
);