Do you by any chance use a Windows account name with special (non-ASCII) characters in it?
If so: there currently is a glitch where sometimes vorpX can’t find vital files if a Windows username is used that contains special (non-ASCII) characters. This will be fixed with the next vorpX version.
Until then please try the following workaround:
1. Create a new Windows user account with only ASCII characters in it (e.g. “kambier”).
2. Reinstall and use vorpX with this new user account.