I don’t have access to the Shop records (@Gwil - help please!) so I don’t know which version of emonTx you have.
You will have either the emonTx V3.2 or the V3.4. You must take the emonTx out of its case.
The V3.2 had the processor on a separate small circuit board labelled “RFμ”, and on top of that is a separate smaller circuit board with the radio module. Therefore there are 3 layers of circuit board altogether. This is a RFμ without the radio module:
The V3.4 has the processor surface mounted directly on the main circuit board, and the radio module mounts directly onto that. So there are 2 layers of circuit board altogether. There is a photo of a V3.4 here.
I do not think the RFμ used the RFM69CW. You can see which radio you have from the pictures here.
When I know what you have, I can tell you which sketch to use - and if changes are necessary, what those changes are.
Do you know which version of the sketch you have? If you connect the programmer, it will list the version on the Arduino IDE Monitor when you reset the emonTx.
You should keep the same feeds to emonHub/emonCMS.