Setting up in dual boot environment

[gandalf]

I had a working V7 for some years and recently moved to V9 on my Win 8.1 OS. I have had issues with the R5000 tuners since the move but apart from that all works fine.
Now planning to migrate to Win 10 and have loaded it on a new partition in dual boot mode on the same PC. That way I keep a working Win 8.1 system until I get Win 10 stable.
Looking for advice on setting up or moving SageTV from the old Win 8.1 partition to the new Win 10 one.
Hardware will still be the same - same discs, same tuners etc.
What can I safely move over and what do I need to create afresh?
I have downloaded V9 of SageTV and will install that.
Presumably I need to install the drivers for the R5000 tuners and the HD Homerun OTA tuners - however if Win 10 sees them, can I safely move over the SageTV properties file or do I need to redo all the configurations and channel setups etc?
Obviously the wiz.bin file will copy over so that the recordings are accessible under the new install - it is the hardware I am seeking advice on. It would be a lot faster not to have to redo all the channel config work for the sources.

[btrcp2000]

Look for a plugin called Import/Export channel plugins. Read the instructions carefully, it was confusing for me, but essentially you are dumping your existing channels from the old server and then creating a file from that dump to be reimported on the new. You will do this once for each lineup if you use multiple for different tuners.

I upgraded both the server h/w and upgraded to v9 over the past several months. First I was lazy trying to just install over the top to see what happened, then by a fresh reinstall using the old prop/wiz. There was always instability, so I wound up installing from scratch and just copying over the wiz. It was painless enough to set up and deep scan the old storage locations that I would say trying to lazy steps was a waste of time. I would recommend letting it create everything on its own aside from the channel imports. Just copy/paste the r5000 lines from the old sage.prop

When you're up an running, let me know if your r5000s record 5.1 sound. Mine will do it live, but not on recorded material

[gandalf]

This is proving to be a frustratingly slow process because the available downtime on the live Win 8 server is limited. However the hardware is not the problem right now.
I have a working dual boot Win 10 / 8.1 system with SageTV V9 installed under both OS partitions. The new Win 10 system sees the HDHR OTA tuners and the old WinTV S-Video input and the HD PVR2 units. I will park the R5000s on one side for now.
It surprised me that the HD PVR2s worked fine. The IR tuning works and the channels tune just fine.
The HDHR tuners work with the HDHR software but, although SageTV sees them and sends tuning commands, the video will not play. Likewise with the old WinTV tuner. It seems to be MPEG2 related because the HD PVR2s use H264.
The Win10 system must contain a working MPEG2 codec (I installed the Windows store MPEG2 software) because VLC and Windows media player will play MPEG2 files. SageTV only offers me default Codec or Microsoft Codec for MPEG2 - neither setting works.
So I figured I would try to load LAV filters. They are loaded now but, although the LAV applications are there and seem to work, the LAV codecs do not show up in Windows and SageTV can't see them. Is there a missing step where I somehow have to force Win 10 to see the newly installed codecs?
Any other ideas?
I a beginning to wonder if I should clean off SageTV V9 and install V7 on the Win 10 partition then upgrade it to V9. That sounds rather tedious so I would rather see if others have suggestions first.