The "R20" indicates that this version is part of the R20 series, which was a significant release for Cinema 4D, bringing a new UI, improved modeling tools, and more. However, without specific details on the ".026" build, it's challenging to provide precise information on updates or changes in this incremental version. Typically, such updates might include bug fixes, performance improvements, or minor feature enhancements.
The file you mentioned is not safe to download or run. If you want to learn Cinema 4D legally, use the free trial, the student license, or switch to Blender. If you already own a valid R20 license, you can download the official 20.026 update from Maxon’s website after logging into your account.
