This may work for you. Copy the ‘scenery.cfg’ file from your old computer and paste to the new one. This file, on my Windows 10 machine, is located in ‘C: ProgramData/Microsoft/FSX’. (You may have to ‘unhide’ the 'ProgramData' folder.) Make a backup copy of the new ‘scenery.cfg’ file before overwriting it just in case. If you have the exact same scenery files transferred from old to new, it should not cause any problems. If there are changes, you can manually edit the ‘scenery.cfg’ file. Just ensure the numbering [Area.xxx] is sequential.