Arduino IDE v2 Arduino.h

Using the Arduino IDE v2.0.0beta.4 it cannot find <Arduino.h> without putting the full path as "C:\blah blah\blah\Arduino.h ". <---Not the real path..
Just what is going on and what have I missed?

Your post was MOVED to its current location as it is more suitable

beta 4 is ages old

I suggest that you download rc3 or one of the nightly builds

I was looking at suggestions that were popping up and someone mentioned a reference to a later version (b12 not the latest) and then a link to the latest rc.
I have been looking all over for an update page for v2 but never found the page until a few hours ago today.
Now it doesn't protest anymore! I do have another issue though which I will post as a new topic. This one is solved...