The detailed instructions to export and post the configurations are here:
http://forum.mikrotik.com/t/forum-rules/173010/1
Exporting and saving periodically on a PC/NAS/whatever a copy of the export is anyway common good practice, as it is making periodically a backup (surely before upgrading the RoS).
The backup can be restored directly BUT ONLY ON THE SAME DEVICE, the export can be re-imported on other devices as well (actually no, it should NOT be imported but rather copied/pasted in sections) but more than that it is plain text and allows to understand and modify if needed the configuration and to compare it against other ones.
The default configurations for a set of “Wireless Wire” has been posted here (useful as comparison/reference):
http://forum.mikrotik.com/t/wireless-wire-cube-preconfigured-plug-n-play-doesnt/173973/1