Library problem switching from arduino-0022 to 1.0

Hi,
to control the humidity sensor HH10H I was using the library FreqCounter. It was not found, when I tried to compile my old (-0022) code under arduino-1.0. I copied the library from my backup to my new personal library folder (in sketchbook). Then WProgram.h was not found. In my backup I find it in arduino-0022/tools/hardware/arduino/cores/arduino/WProgram.h. But copying the .../arduino folder to personal libraries does not help.

Does anyone know how to install the FreqCounter library properly under arduino-1.0?

Tahkns,

Rolf

See point 2 here: Arduino Forum

Thanks a lot,
Rolf