Where can i find a source code example?
At this link you can find example in C# and Java:
https://sws.firmacerta.it/download/sws_cnet.zip https://sws.firmacerta.it/download/SignEngineWebClientSaaS.zip
How can i upgrade SWS appliance menu to latest version?
Login SSH to SWS appliance
Execute:
sudo yum update https://sws.namirialtsp.com/download/sws_menu.rpm
How can i obtain the latest version of SWS appliance?
At this link:
History - SWS OnPremise - RPM package#HowtoobtaintheOVFvirtualappliance
You can obtain the latest version and the details for import and configure