Here's a small modification to the default Clickteam skin in Fusion 2.5. Mostly colour of event groups and changes to the tickbox to how I've always had them.
Here's an updated version which should work...
Unzip and copy to your Skins folder (something like: C:\Program Files (x86)\Clickteam Fusion Developer 2.5\Skins\Ovine ), then in the Fusion preferences you can select the Ovine skin on the Workspace tab.
Ignore the original attachment shown below (can't seem to remove it)