Are you editing the .css files? If so then that's your problem - you need to edit the LESS files:
Ohhh, I have read several times that it´s made with less... Thanks.
Since I'm having a hard time with the subfolder installation, I decided to do a subdomain installation. Frontend seems to work fine, but there are a few issues with the ACP.
The Emailer (Local) page is blank.
Unable to navigate the tabs on the General Settings page. No matter which tab I click, the General tab is displayed.
The local emailer plugin probably needs to be updated to use the new
action:app.load filter. (Paging @barveyhirdman )
As for the latter problem -- what errors show up in the web console when you attempt to click on the tabs in the General Settings page?
@planner @julian will try to update it tonight, haven't touched node in quite a while