I noticed when downloading the 5.16 beta package that the WinSCPnet.dll for the 4.0 framework is not signed (strong named) whereas it has been in the past. I see there was a similar issue posted a few versions ago which you fixed but it seems to have happened again?
The one in the "netstandard2.0" subfolder is signed, but the one in the "net40" subfolder and the same net 4.0 one in the main folder are both not signed. I've just double-checked. Just right-click on it and notice the absence of the Digital Signatures tab.
Also, while I've got you - 2 questions: (1) I noted in changelog that it now targets the 4.0 framework. The install instructions still reference that it works on 2.0 framework. Will it still work on the 2.0 framework (not 2.0 standard, I mean the actual 2.0 framework) if 4.0 is not installed? (2) Do you have any guess as to when 5.16 might get out of beta?