Don’t worry, in almost every case your model can be recovered with large certainty. Opening a model will always create a local back up in your temporary file directory. The directory can be accessed from the software TOOLS -> Open Model Temporary Directory. Recently opened models will be named “fluidit1231245123”. By zipping contents of any of these folders into one package, the package can be treated as a file of respective Fluidit software.
For more detailed help please contact: firstname.lastname@example.org