Problem found and I'll be updating it soon with an update. As for the import, if errors pop up then it means that either you didn't import correctly or you imported the wrong file in.
Thank you for answering so quickly!
When I tried to import my old save I clicked on "import" and then from the first season' supernatural folder I selected "roes1.twinedata" and "continue", after that it shows a long list of errors.
If it was my mistake I apologize, and again thank you for your patience!