Looks like it was restoring the files you had loaded and blew up in color coding. Could you also send your vrestore.slk ?
If you open 23.0.2 and look at the list of files you had open, these are the files that 24.0.0 is going to try to open when it migrates your config and starts up. You can then open v24 in a clean config (open -a /Applications/SlickEditPro2019.app/ --args +new -sc /tmp/testconfig), and one-by-one try opening the same files that you have open in 23.0.2. One of them should trigger the crash, then we'll have a nice isolated case to debug.