1) the logo is gone and even after I re-attached it its still nowhere to be seen
To make the logo work please use the solutions posted in the following topics.
https://colorlibsupport.com/t/logo-not-showing/#post-90961
https://colorlibsupport.com/t/huge-problem-with-website-after-theme-update/#post-90771
2) The read more at the slider changed back to read more from my translation to swedish : Läs mer
Please change it again using this plugin Say what? – WordPress plugin | WordPress.org or using the solution posted in the below topic.
3) The drop down menue started to ignore the color-changes and whent fron green background to purple on hoovering
You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.
Admin Area -> Appearance -> Customize -> Activello Options -> Other -> Custom CSS
#page .dropdown-menu> li> a:hover {
background-color: #24891b;
color: #fff;
}