Version 2.3.2, mirrored here for those unable to obtain it from NexusMods.
Changes
Fixed a UI issue that caused "Primary Weapon" and "Secondary Weapon" to be switched around when editing loadouts.
Fixed a performance issue that occurred when pasting large amounts of script code into the source editor.
ReachVariantTool is meant to be able to run as a GUI application or "headlessly" as a console application, and (due to foundational limitations in Windows) has to resort to some ugly tricks to achieve this, resulting in visible oddities like a console window briefly appearing at program startup. The ugly tricks have been marginally improved, which should hopefully fix reported bugs with the aforementioned console window remaining visible for the full time that RVT is running.