It's possible that one of your skins is crashing Rainmeter. Try to follow the steps here and let us know how that goes:before i used it normally, but after i forced it to shut down once it never showed up again, no matter i launched it with administrator, it just showed the icon in the taskbar and then disappeared
https://forum.rainmeter.net/viewtopic.php?t=27981
EDIT: Balala's suggestion below is much better as a quick an temporary way to see what's the culprit, so make sure you try that first before potentially following the above steps.
Statistics: Posted by Yincognito — Yesterday, 1:10 pm