I manage to import the elements from TalendStudio-20221003_1400-V8.0.1-windows-x64-installer into TalendStudio-20221003_1400-V8.0.1-windows-x64-installer but when I do the other way I am told element invalid
Are you trying to migrate project from TalendStudio-20221003_1400-V8.0.1 to TalendStudio-20221003_1400-V8.0.1? Same versions? Or from open studio 8.0.1 to subscription solution 8.0.1?
If you are on the second scenario, you need to use Migration Token to achieve it.
Since version 7, Talend Studio requires a migration token to complete the migration, for more details, see this KB article.