@Mykle1: that seems to have worked. I just entered the MagicMirror folder and ran the command! thanks a lot! the animations are a lot better now!
However, now i have another problem: it seems that the weather forecast module does not work. All other modules work as expected but the forecast does not show up. I double checked all the settings in the config.js and they seem ok.
@Mr-Sponti: thanks for the input but it seems that simply installing 1.4.15 over the 1.7.9 seems to have already working
Could it be that the weatherforecast plugin comming with MM 2.10 is the problem?