Hi,
first things first, all modules installed on the iMC can be checked if you go the top-right corner on the WEB GUI of your iMC (you will see the name of the operator currently logged in), click on that and then About. If you don't have installed modules, you should see the platform and the VXLAN (also part of the platform, but visible here as separate module).
If you want to go from 7.3 (E0706) to the latest version, you should first upgrade to 708, then 710, then 710P06 and then the latest patch 710H10. You should also upgrade the modules (if you have any), but the versions of the modules are slightly different then the platform version. On the support portal you will find for every major iMC release (708 and 710) module compatibility matrix, where you can check which module versions are supported with the respective iMC major version.
Thanks,
Best Regards,
Ivaylo
-------------------------------------------