Nodes are invisible in the main graphics window of Ram Elements.
The nodes are in the model, they can be edited in the spreadsheet, and the node numbers can be displayed, but the dots for the nodes cannot be seen in the main graphical window.
Problem started after April 18 2017 as a side-effect of Windows 10 Professional update build 1703 (aka Creators Update). Various graphics adapters and drivers are affected, but updating the drivers does not typically resolve the problem.
Fixed in version 13.05.00.224 and after.