Hi Lewis,

re:
> So if there would be live/proceed or some sort of button on that panel which then start process
> instead starting as soon as it's opened ?

Sorry, no MoI's UI is specifically designed to not need an update button like that, it just automatically cancels the current calculation and starts an updated one whenever any meshing parameters are modified.

One thing you could do is to select just one object and do File > Export, that will pop up the meshing options dialog on a low computation load and once you have the settings how you want cancel that export and the same settings will be used on your next full export.

- MIchael