Hi, I have uploaded older versions to my stash and you can find them here:
sta.sh/22fjsdpt9k3hHowever, I am not sure if they will work for you because Discovery was designed for Windows 7 (it should work with Windows 8 too, I guess). Also it should work with 3.0.2 (older) Rainmeter and not need the 3.1 version. It is possible I have forgotten to set the older version for required Rainmeter in the installer so try to use Discovery 1.4.2 old and if that doesn't work for you either, try to go back through the versions untill you find the one that works...