I had the same issues, namely random crashing (especially when entering the route planning window) and I also was not able to add new aircraft to the database. Then I had an idea. What if pfpx is installed on a machine without the necessary visual c++ redistributables? The pfpx-installer installs them for you. So if pfpx is installed with the c++ version it has been programmed on, everything should work fine.   And it does! :-)   So here's what I have done:   1