lines overwriting plugin

hi
i reinstalled complete wordpress and kingsize theme
it now seems your plugin is not working because some files are overwriting your code.
i am barely able to change shadows and login-interface color, but no logo, nor the background color will work. i got an ugly mix of my theme and your plugin,..
can you tell me where i have to cancel(delete files in order to fix this?

thank you

https://www.ads-software.com/plugins/erident-custom-login-and-dashboard/