Error opening corrupted file:

[dineshsubramani]

Hi Guys
Am frequently facing this issue when i download a .dyn file from forum for reference

iam using revit 2018.3
Dynamo

[Marcel_Rijsmus]

these are Dyn files made with Dynamo 2.x probably

[dineshsubramani]

Hi Marcel
How can i sort it out ?

[Marcel_Rijsmus]

if you open a file in notepad a 1.x file looks like this

whilst a 2.x file looks like this