Problem with saved my mod

Help! I created my mod on the mcreator 2020.5 version, but then I downloaded mcreator 2021.1, loaded my mod there, but all the mod elements did not work, then I switched back to mcreator 2020.5, but all the saved mods there simply disappeared, I remembered that I saved my mod , and loaded it there, when I entered my mod, then all the textures that were there before simply disappeared, and all the elements and settings of the elements remained. What should I do?