I took the plunge and installed CumulusMX onto my Raspberry Pi yesterday. Everything went reasonably well and I learnt a lot but there was one thing that I think would help on the instructions given in Cumulus MX Announcements - PLEASE READ THESE FIRST
I did this and then altered the Port setting in the old .ini file to /dev/ttyUSB0, when I started CumulusMX it couldn't find the station. Eventually I discovered that the port setting name in CumulusMX has changed from Port to ComportName. Once I changed the setting name from Port to ComportName everything went well.Alternatively, you can unzip Cumulus MX into new directory first, and then copy over your existing data files and your Cumulus.ini file, and any other configuration files that you may have created (e.g. strings.ini, twitter.txt etc).
Did I miss an instruction to do this? If not perhaps it would help to include a line about it in the announcements.
I am really impressed with MX, and looking forward to exploring more. Thanks very much for all your efforts - donation on its way.