Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
From build 3044 the development baton passed to Mark Crossley. Mark has been responsible for all the Builds since. He has made the code available on GitHub. It is Mark's hope that others will join in this development, but at the very least he welcomes your ideas for future developments (see Cumulus MX Development suggestions).
If you are on the latest release Build 3121 then Settings / Web/FTP Settings / Interval Settings / Graph File Settings and untick the ones you do not want.
Have already been there and solar not listed, but I'm still on 3094 as I have personally tailored some MX files and been reluctant to upgrade and having to redo my mods.