Bump to v0.4.0

Author: Secret-chest

main.py

@@ -19,7 +19,7 @@
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-__version__ = "v0.2.0"
+__version__ = "v0.4.0"
 __author__ = "Secret-chest"
 
 import tkinter.simpledialog