No, as for as I know if you are the usage of any bootstrap theme in Mobirise is limited. I had the same issue and discussed this issue with their support. You buy some theme and use it with all updates for free within one year. After that, you can use the template without updates for free but without any updates (it would be impossible to update app wither).
If you want to use it with updates, you would have to buy the extension for one more time.