Mac Spinning Wheel appears using BC library

Former Member
Former Member
Since Basecamp 4.5.0 do I have an issue when surfing through the library column.
By surfing I mean scrolling and clicking several maps and routes or tracks.
When doing so after a few clicks the Mac Spinning Wheel appears.
The only way to release BC again is waiting severals minutes or moving the mouse-pointer over the Mac Dock.

I already removed the Garmin files from the Saved Saved Application folder.
And I have removed Basecamp and re-installed it.
My Mac is running OS X Yosemite v10.10.4
And this issue appear on my iMac and MacBook retina.

Does anyone know a solution to this problem?