Difficult to know what happens, and what you're doing
First of all, it's useless to reset the database with the editor menu, and useless to start the game with EA database.
Because this database was made for a game and editor starting in july 2013, so sure it will crash at a time or another !
If you want to backup the database, you should make a copy of the entire "database" folder of the game after installing the game and the update#3 and saved it in the editor.
Then, if you made some changes in the database and want to restart with the FCM's original, you will have only to copy this "backuped folder" in the main directory of the game to go back to the LFP18 update#3 database. (then open editor, save, export)
When you are creating your several career :
1- did you add each time more countries to your selected list (until reaching Georgia, Gibraltar) ?
2- Or do you only selected few new countries in place of those of the previous career ?
If you add more and more countries (option 1), the game may crash because you have selected too many leagues.
If it's not the case, maybe you have an issue with your manager profiles (sometimes it may happens, and i don't know why) because it's seems the game crash before the manager selection screen !
So maybe try this :
- make a backup of the ManagerProfiles.dat file (located here : C:\Users\******\Documents\LFP MANAGER 18\Config) in order to keep a copy of this file if it's not solving your issue.
- and delete the original ManagerProfiles.dat
Then try to start the game (maybe first with the leagues creating issues, Georgia, Gibraltar) you will have no manager profile at the start and need to create a totally new one.
I'm not sure of anything, it's just some ideas.
if nothing works at all, i have no more ideas to help.