Something you could try. When the open dialog finally arrives, at the top of the left pane is a drop down box for history, drawings, templates, custom. Is your set to History. If so, use the vertical slider in the left pane to count how many history items it looks for, the default I think is 20, but can be set as desired by right clicking in the pane, and choosing Define history length. too high a value could slow things down.
My default was 50. I changed it to 3 and the time it took to get to the New Drawing
popup was reduced by some 7-10 seconds (now at 30 seconds).
Based on my understanding, the cause of this delay is the fact that TurboCAD is written to reference DLLs (Dynamic Linked Libraries) to bring up the various program functions. There are literally thousands of DLLs (2,236, in my installation) in the Program64
folder and only one processor core loads everything while booting.
I don't know how many of the 2,236 DLLs are loaded to get to the New Drawing
popup, but I do know that running everything through one processor core and loading many, many different files is not going to be fast (even with the NVMe M.2 memory card I use as my boot device). My LabVIEW program takes about the same amount of time to load.