thanks Alex.
yes, .wma lossless is the codex i used in MC11 for all the master copies in my audio library.
as i recall my purchased copy of MC11 was a little over a year old and i was disappointed that JRiver declined to patch it for MS's new WMP .wma lossless codec, as i would expect any company to do with software that recent when something as essential as MS compatibility is concerned. paying again to move on to MC12 (which had nothing new of interest to me, other than the fact that this issue was corrected), in that light, appeared as the next step in an endless merry-go-round that I decided NOT to get on.
i appreciate the hard link to MC11.1.201. when this issue arose, whenever i attempted to update or patch my version of MC11 to a subsequent release, JRiver's web page link for that purpose (and the link within the software itself) would force a download of a trial version of MC12 instead, which further infuriated me. somehow i doubt that MC11.1.201 addresses this .wma lossless issue, unless i hear from someone inside JRiver directly confirming that here.