Bit of an update.
Strangely, if Studio Pro starts up at the same time as my computer, it loads quite quickly, not hanging on Fender Services Support.
- In other words, when I shut down, if Studio Pro was open (with the current file saved obvs), and it starts loading as soon as the OS has been loaded, it loads fine.
It also loads fine if I have previously opened Studio Pro in that same session (the computer having not restarted).