I'm another of those explorers who rushed back into port for the 1.1 patch.
I'm suffering the same CTD in UniCart that a lot of others are seeing. I have data from both before and after 1.1, though most of it is before 1.1.
I had a look at the Galaxy Map tonight (as it's something I can do sat in the hangar), and I have a speculation as to what has happened with UniCart.
Some players have complained that systems have changed. Stations added, removed, renamed.
I've found a system that's been warped 5000ly across the galaxy and in doing so has broken my system data.
V1357 Cygni used to be at [-1841:95:610]. I'd scanned the 2 objects there, the main star and a black hole designated Cygni X-1.
Cygnus X-1 is meant to be 7000ly away from Sol at the star HD 226868 which used to be found at [-7095:401:2396]. V1357 Cygni is now located where HD 226868 was. It is now in the correct location, but with the wrong name. The replacement for where V1357 Cygni used to be is now called "Star of India".
Another system is HD 227018 [-1638:78:535]. I've definitely visited it, and I can see the system data button is highlighted. Clicking it sends the map into a loop of searching for the system data and never completing. Pressing ESC drops out to menu, and I can close the game gracefully.
I reckon these map changes are breaking the correspondence between a Cmdr, the data from their system scans, and the new locations. It may be a reason why UniCart is constantly crashing for a number of players but not others. The players who have been out exploring for more than a couple of weeks will have older data that may be incompatible with the updated galaxy map schema.
Like I said, I'm speculating.
In the meantime, I'll be kicking back in my comfy cockpit chair, paying the hangar rental, and working out what I'm going to spend my exploration credits on when I can finally access UniCart.