I am NOT very familiar with modifying FSX files. How can I get it to rebuild my SimObjects (preferably aircraft only) after a minor change to one of my aircraft? On my other computer which I also run FSX I use FSPS Extreme and there is a button to select to rebuild SimObjects. I don't want to pay for another version of that program and I have searched and searched the forums and can not seem to find an answer. Thanks in advance for any guidance you can provide me. :rolleyes: