Hi, does anybody know why there is no download link for this update? Can anyone share me the file? Thanks
You can find the legacy software here. 
https://www.universal-robots.com/articles/ur/documentation/legacy-download-center/
The latest software is now 5.14. It is fully compatible with SW 5.13. it can be found here: Universal Robots - LATEST Polyscope Software Update - SW 5.14.5 - e-Series/UR20