Easing effect for absolutely ANYTHING: Transparency, volume level, effect parameters, animation frames, you name it. Pick from pre-defined easing effects or def...
It seems to be a Construct bug that prevents you from installing the new version of a plugin. You install it and it all seems like it installed the new version but it actually didn't.
To fix it, visit editor.construct.net and clear all site data from developer console (you can easily Google how to do it). You will have to install all the plugins again. Also all the settings are gonna be wiped out. This is the only way I know to get around that problem.