If you exited via menu, your SE should have saved your position and/or ship you were using, also your journey log should contain your visited objects (journal.cfg).
Check your se.log to see if your program closed properly, you should see a line with "FINISHED" at the end of the file.
If you mean orbital positions, your orbit could indeed be decayed in some conditions due to program issues in 0980 version.
Default location bookmarks are saved in config\places-def.cfg file, you can change .cfg extension to .old and they'll not be loaded again.
"Time is illusion. Lunchtime doubly so". Douglas N. Adams
| My mods: http://forum.spaceengine.org/viewtopic.php?f=3&t=80 | My specs: Asus x555ub - cpu i5-6200u, ram 12gb, gpu nvidia geforce 940m 2gb vram |