I have tried to upgrade an BM 3.5 to BM 3.6. on NW4.11

In Install.nlm/Installed Products the file copy seems to work, but
after
the server is rebooted installed products still list BM 3.5 as
"installed".

Also NWAdmin still shows the BM 3.5 "User Interface".

What steps do I have to go in order to get the upgrade running?

Is there any to do list perhaps in a TID?

(I searched NSEPro and online and although there were many upgrade
issues
none pertained to my problem.)

Thanks in advance,
Detlef Krusekopf