Sorry to hear about the issue.
Formativ automatically create a backup of the working applet in the default Formativ applets folder, usually c:my documentsadvansysformativapplets. The backup applet has the “.vb~” file extension.
If you unable to recover from the backup then you can send the encoded applet to support (firstname.lastname@example.org). I think we have a utility to unlock the encoded applet.