For those with problems to import text file from SiemBrief to Pilot2ATC, I found out that is best not to use you CTRL-C instead just click use the provided "copy" tab in SiemBrief then paste to your Pilot2ATC.
It appears that the wrong format gets copied when you use any other type of paste and copy and you will get an error " Unable to copy.... format" when you click import in Pilot2ATC to import a flight plan.
Joe Z