Here is a list of the most frequently asked questions about Ultimate DNN Blog Module – SunBlogNuke. And you can see another guideline "troubleshooting common problems" for further questions.

What is SunBlogNuke?
SunBlogNuke is the enhanced and ultimate publishing tool on the DotNetNuke(DNN) platform with a focus on simplicity, ease of extendibility, web standards and usability, which a highly capable suite of modules for blogging on your DNN site. SunBlogNuke was born out of desire for a better blog platform so it'll have your website up in a snap with interactive features. Take a tour with the link.
I currently have Version 2.3.25. How do I upgrade to 2.4.1? Will my existing blog be safe?
Please look in the download page for the version you purchased for a free upgrade! You will get the latest version there. Then just need to directly install it again and do not have to uninstall it at first, so it is safe for your previous posts and data.
Is SunBlogNuke compatible with .NET framework 2.0?
Yes, it is compatible with .NET framework 2.0 and below IIS 7.x. Update: it required .NET framework 3.5 from SunBlogNuke v4.x.
Does this blog module support localization? Can there be two versions of the same blog post, one in English and one in Spanish?
No, it does not support that content localization now but the great feature is included in the module roadmap and will be available in future.
How is SunBlogNuke licensed?
SunBlogNuke is licensed under the "EULA - End User License Agreement". Please visit the link to get the more detail about the terms of the license for our modules.
If I have trouble about your module, can you help out and where I can find helps?
Yes, as long as the trouble is SunBlogNuke related. For information about the use of SunBlogNuke or how to create themes, you can find almost everything you need at our Team Blog. If you want to technical support or bug reports about SunBlogNuke module, check out the support forum.
Could you please let us know if we qualify for the upgrade and if so how to proceed? Is it as simple as just uploading the new version?
Yes, you can feel free to access upgrade with license for a year and you can renew it when your free upgrade subscription expired. And in the upgrade process, please follow up the upgrade guideline with suggested upgrade path there. 
Is there an upgrade path from professional to enterprise?
You can just pay us the price difference for the upgrade and we will assigned you a new download link to get the enterprise version. Please get the more information here.