Please note:
Softros LAN Messenger v4.0 and above has lost backward compatibility with its previous versions due to changing the encryption algorithm from BlowFish to AES. It means that you cannot mix the different version on your network because v4.0 and above will not see your previous version in users list.
Chose only one version line: pre-v4.0 or v4.0. If you used pre-v4.0 of Softros LAN messenger together with Softros TS Engine, you also must update your Softros TS Engine to v3.0. To get old versions click here.