How to export old travel databases to CL? I am using 2.1.7 ver.
Do you mean you wish to import old journal files to CL? There's a facility for that.
Create a new blank trip DB, highlight it, and click the import button.
Note that that'll import every single jump and scan into that one trip DB, which could take a while to import and subsequently be unwieldy to load and use afterwards, so my advice would be to have a look through the Journal files and separate your trips into batches by moving out all other journal files except the ones representing date ranges you wish to import, then move those out, move another batch in, create a new trip DB and import those, rinse, repeat.
Otherwise if that sounds too much like hard work, just import 'em all in. At the very least it'll build up the central GALAXY.db which holds all the system data.
Perhaps one of these days I will set about adding more features to the Journal import facility, but time/effort/etc....
Hope that helps o7