>Looks like the switch wasn’t being flicked properly
Formativ 18.104.22.168 is unaware of the issue with XP themes and consequently does not attempt to switch off themes when displaying the Forms editor. The fix is only available in Formativ 2.0.1.
Short of upgrading to 2.0.1, the workaround (as you have found) is to turn off XP themes in the Windows display properties. Unfortunately this will be necessary for every user of Studio/Creator in your organization.
I hope this helps.