When I was able to get the bootstrap as an option in JMP 14, clicking on the words was different from clicking on the numbers. In this case, I am definitely right-clicking on the values. Bootstrap simply is not an option for me. I've tried it on my home computer as well as my work computer.
One thing I did find is that for JMP 15, bootstrap is an option for the MAC but for my Windows version, it is not an option. I may try to uninstall and reinstall JMP to see if that helps.