Thank you for the request, I see what you mean. We will consider the issue.

I tried the measure tool and it snaps to node points when I measure a distance.
But I have an idea why you have the problem. With high resolution monitor users have to be more precise to catch a node point. Also the square that highlights when pointer is on the point becomes smaller and it's harder ...

Thank you for the report, could you send PCB file to DipTrace support or upload on the forum?

We revise our feature list now to schedule our development. I will insist to implement this feature. Thank you for your request.

I guess you edited pad layers. Please right click on a pad and open "Pad Layers" from submenu. Both layers top and bottom should be enabled. If either layer is disabled then the hole is excluded from NC drill file.

If some 3D models are missed you can search for them on https://www.3dcontentcentral.com/

Please update to the latest build (5.1.0.3 at the moment) and let me know if you still have the issue.

There is the only net (Net 0) in your design. You can see the Net 0 only in the design manager. Also you can hover mouse pointer over any existing trace and see that all traces are highlighted, i.e. they all belong to the same net.
I think, you merged different nets into the only net by accident. As ...

It's common to have ground and power planes on internal layers of 4-layer PCB. Outer layers are signal. This is not "must have" but very popular solution.
Based on the stackup you can calculate trace width and primary gap for 90 Ohm impedance.
There is no simulation of the impedance matching in ...

Bill of materials can have as many columns as you need. You can create an additional field in component properties. Then you will be able to add new column in the BOM and show the value of the additional field in this column.