Hi Marion,
I got the new OMN about a year ago and once I got used to it I'm well pleased. Yes, it was a shock, I'd been using the old system since 2002 and found transferring old files a bit of a problem. Also you cannot reverse a route by right clicking as there is no option for "reverse route".
If you open GPX manager, select a route then view that in GPX editor you get all the details in a big chart. I'm on Windows 10 too.
I've pestered David at OMN Support a few times with queries when I haven't been able to answer these through the stuff on the Support site and he has been very helpful. Persevere with it and I think you'll find it pretty good.