What is the latest known good riched20.dll

[cnewtonne]

The original dll that comes with a default install causes UR to crash few times a day. I noticed it to happen when pasting content from a web page. I ended up updating it to the dll used by Office 2013. This seems to fix the crash as pasting same content no longer crashes UR. However, I can no longer do bullets i.e. text gets indented, but the blacks circles or numerals no longer appear.

Those dlls are the only ones I have on my system. What is the latest know ddl to work flawlessly with UR and where can I download it from. Google did not return any useful links.

Original install : riched20.dll version 5.50.99.2050
Office 13 : RICHED20.DLL version 15.0.4693.1000