Only tried in 1.0.7
Running Windows 7, 64-bit.

When I adjust the preferences, they don't get read correclty on next run.

I.e. I set editor to be extarnal = true.

When I run, the load function reads the line editor.external=true, but does
not set it, since it is not platform specific, and keeps the default. When
I close processing, the preferences file gets overwritten. So I have to set
the preferences every time.

I believe the problem is in the load function of Preferences.java

If I add .windows to the end of editor.external, the setting gets read, and
the option is sat when processing starts, but the setting gets lost again
when I close, since the line is removed from the preferences file when I close.

If you put all plattform specific keys in it's own hashmap, untill all of
the file is read, and then apply them, you will avoid plattform specific
keys getting overwritten.

edit]
Possible solution to bug.

Possible solution for the loading.
It does, however, seem to be a problem with platform specific settings, that
they disappear from the preferences-file, unless they are among the defaults.

*** This bug has been marked as a duplicate of 1320 ***