Thank you for the quick response.
I already had the windows systems setting set for Germany but with the . as decimal separator because that solved a problem with the bgl compiler. That resulted in the previous logfile.
I now changed the decimal separator to the ,  and rebuilt the data base. Again no airspaces.
Then I changed the windows systems setting to England (. as decimal separator) and rebuilt the data base. No airspaces. The log file is here  https://dl.dropbox.com/u/27604562/Plan-G_Log%20-%201.txt

The funny thing is that I had the airspaces in the early version of Plan G, but I dont remember which one.

Any other ideas? Again, I have been living without the airspaces ever since so there is no need for extensive effort to find a solution. It would nice though to have the airspaces.

Hi Tim,
Plan-G is a fantastic program which I have been using with fs9 for quite some time. I have now changed to V3 and I have the same problem as with v2. I have never addressed this problem before. I do not get any airspaces displayed although I have ticked the corresponding boxes. I have now looked into the Plan-G_log and it appears that for some reason the airspace info is not read into the Plan-G database. Here is the link to my log file:
https://dl.dropbox.com/u/27604562/Plan-G_Log.txt

Maybe you can help me.