Are you exporting all your Operations in the same operations library, maybe even the default location? The export dialogue will have a .mcam-operations file extension next to the folder icon at the top of the dialogue under ‘Destination File’. You can change this location by simply clicking on the folder icon next to the destination file and creating a new folder with as few or as many operations as you like. It is also worth noting that exporting operations is an unnecessary step if you are re-importing into another Mastercam file. On the import dialogue you can import directly from a Mastercam (.mcam) file. It does not need to be an operations library file type to import operations.