Hey BigC,
Ive done quite a bit of digging on this and the data is showing:
- Low Poly Foliage Jungle Pack for 4.10 and 4.11 was last released on the 10th of Dec 2015.
- Infinite Affordable Landscapes for 4.10 was last released 1st of March 2016
- Infinite Affordable Landscapes for 4.11 was last released 15th of April 2016
These values correspond with what we have in our version control system, and leads me to believe they are our most up to date data. If the Author believes otherwise then they should definitely contact the Marketplace team.
Unfortunately Authors cannot always keep content up to date for all versions of the engine. This is a process which is not currently automated as it often requires them to manually make changes in old versions. Sometimes these changes are not possible as they may require a new feature only provided in a newer engine.
Please continue to investigate if you believe the content is from well before these dates. Otherwise I suggest updating the project to 4.11 OR contacting the author to see if they intend to do a re-release of the latest content for 4.10