Fixed a crash.

The editor wasn't checking if the last opened file actually existed, so when it didn't exist, it crashed every time.

utils.py

@@ -1,8 +1,8 @@
 #!/usr/bin/python3
 
+import os
 import sys
 from pathlib import Path
-from PyQt6.QtCore import Qt
 from PyQt6.QtWidgets import QMessageBox
 from file import File
 
@@ -110,5 +110,6 @@ class Utils:
         if len(sys.argv) == 1:  # if no parameters were passed to the editor
             file_path = self.app.settings.last_opened_file
 
+            if os.path.isfile(file_path):
                 file = File(self.app, file_path, file_path.split("/")[-1])
                 self.app.open_files[file_path] = file