It’s taken me 2 weeks to finally get the answer from Olympus so thought I would share it here for others!

The latest version of the OMDS citrix client virtual driver is 2.2.3. This is compatible with the current version of ODMS 6.2.2. 

Client Virtual Driver to improve audio quality from our existing 1.0.13 version can be downloaded here : http://opdsupport.com/component/rsfiles/details.html?path=1.%20Software/2.%20DSS%20Player%20Pro%20Release%205/2.%20Utilities/CitrixClientVD%20(1.0.13).zip&Itemid=evcxfienkroty

Update , there is a new version : 

http://opdsupport.com/component/rsfiles/download.html?path=1.%20Software/2.%20DSS%20Player%20Pro%20Release%205/2.%20Utilities/CitrixClientVD%20(1.0.14).zip&Itemid=evcxfienkroty