This is a breadcrumb for those that may be experiencing the same issue that I had. I had downloaded Perl and tried to install MySQL from the DroboApps menu. It would install, but not start.
I eventually figured out that Perl is installed into the DroboApps/Perl5 directory. The MySQL service.sh file is referencing $DroboApps_Dir\perl on lines 39 and 43.
I changed those lines to $DroboApps_Dir\perl5 in both lines, and then the MySQL application successfully started.
I haven’t tried anything else yet, so I hope that is all that is required.