Check the notification server config file (DWNotificationServer.exe.settings) and verify it is pointed properly (Connection Setting portion of the XML). Very surprised it is starting up at all!
DocuWare.Communication.AuthenticationServer.Exceptions.DWAuthenticateException: Cannot find active authentication server. All servers are either stopped or the communication channel settings don't allow a connection. ---> DocuWare.Common.Exceptions.DWRemotingException: Cannot access server url 'gtcp://localhost:9000' . Check that server is accessible and use compatible communication options ---> Belikov.GenuineChannels.GenuineExceptions+CanNotConnectToRemoteHost: Can not connect to the remote host "gtcp://localhost:9000". System error message: No connection could be made because the target machine actively refused it 127.0.0.1:9000.
Check the windows installer cache for any DocuWare MSIs. It is a hidden folder, even with 'show hidden folders' enabled, so go there manually - C:\Windows\Installer. You'll want to add the author and comment columns to find useful files. It could be something is still stuck ... so right click on the MSIs and choose uninstall. Not sure if that is the issue, but worth checking.
Correct me if I'm wrong, but stapling isn't a file cabinet function - it can only happen in the document tray. Each document tray is now its own little filing cabinet (essentially)....so the FC GUID it is looking for is probably the GUID of the document tray and two (or more) DocIDs of documents in there. You can CLIP to a document in the FC with a document in a Tray.
It could be the result dialog you're using has the option set to display first document immediately? Even if you choose the file cabinet option in URL integrator, the FC still has a default result list...
If you can enable the SQL command, you can specify a query to a certain group. I split it onto multiple lines so you can read it, but I think it will need to be a one liner. If that isn't available...you could make a view from the same query, which should then show up in the table dropdown. In theory anyway.
select dwuser.name from dwusertogroup
inner join dwgroup on dwgroup.gid = dwusertogroup.gid
inner join dwuser on dwuser.uid = dwusertogroup.uid
where dwusertogroup.gid = <yourgroupid>
I can't speak directly to DW7 & its specific versions of Tomcat and SOLR, but in the end it is still just a Tomcat instance. Check out the Tomcat server properties - it could be the JVM is hard coded.
From an elevated command prompt, navigate to the install directory of FT Server. Run the configdwtomcat.cmd file - you'll be able to edit all the settings for the Tomcat server...RAM, JVM startup properties, etc - and the path to the JVM Tomcat will try to use. Make sure that has the correct path for the SDK you just installed.