Hi,
I'm sorry to hear that you're facing these troubles. There's no need for a license for rendering purposes - our plug-ins can be widely used on render farms as network rendering nodes do not require any type of license. The installer includes the "
Render slave node" mode specifically for these purposes.
I suggest doing a quick test using 
RailClone Tools to export all distributed geometry to instances. You can find it under 
Utilities - 
More ... - 
RailClone Tools. For more information, please refer to our 
online documentation. This will help you determine if the problem occurs during the RailClone object conversion.
Best regards,