Hi Stagecoach.
EIT and MCM last update (essentialy a few fixes for some very specific configuration that did not give the correct expected results) works fine for me under last beta SP3 build 93467 and has been tested with no problems on the usual 5 routes and sessions I use as representative tests cases of how EITS and MCM are used by most trainzers.
Have you checked that all updated assets downloaded from DLS were correctly submitted (no remaining asset opened for edition) ? Have you tried a database rebuild ?
If after these actions, you are still in trouble with latest updated versions, can you package in a cdp your route and session (and any dependency not available on DLS) and send it to me via email with some information about which tower, path, train, ... is in trouble so that I can have a look to it. I will send you my email address via PM.
Regards.
Pierre.