so first, which path are you going down? have you given them access? if they contact us we can shoot them a copy of whatever they need to play with… or for testing purposes you could just give them your files or access…
and second, just to be clear, we dont know exactly what the issue is with that plugin… but what we have been seeing with plugins that add buttons and other to the wp editor (tinymce) incorrectly assume that the wp editor is only shown in the admin… but with the wp api, that is very untrue and it can be used in the front end of a site like with simple press…
what Andy alluded to was that for many of the plugins we have run into issues with on tinymce, they were using the init hook to do their thing… that hook runs on both front end and admin side… but other stuff they were doing assumed only admin… for those, simple fix was to use the admin_init hook instead so their stuff only ran in the admin…
as I said, we do not know for sure if that is the issue with ultimate tinymce…
but we are willing to work with them to resolve it…