Hi Martin, do you mean your slow launch problem is that it takes around 3 seconds for it to launch? I guess that's a little slower than "instant", but kind of not all that slow in the whole scheme of things. When you were referring to slow launch time I thought you meant something like a minute or so to launch, not just 3 seconds... If you want to speed up that 3 second launch time it maybe you could upgrade your system to have a SSD drive if you do not already.

I don't know what I can do about the slow file dialog problem, especially if it happens in other apps too. I don't think that's supposed to be normal though... Do you maybe have a whole lot of files in the directory that it opens up on to?

Looking a bit on the web I can see some others have had similar problems:
https://discussions.apple.com/message/12356893#12356893
https://discussions.apple.com/thread/5495797?start=0&tstart=0
https://discussions.apple.com/thread/5492808?start=15&tstart=0

There are some tips in those discussions you could try - some people mentioned that a failing hard drive or some kind of drive corruption might cause that. If you have some external USB hard drives maybe try unplugging those and see if things behave better.

- Michael