Hi dear ARP2600V enthusiast!
The whole Dev Team is currently working on heavy parallel projects, pretty much exciting but unfortunately lowering the priority on "less critical" things.
During the summer I could send users a bug fix version 2.0.1 for the ARP2600V, through private correspondence at the Technical Support only.
This version still has not been submitted to our grid of tests, but all I received was only positive feedback from the voluntary testers.
I presume it is now time to reveal where the version 2.0.1 is hidden, and let you get rid of the "sluggish GUI" symptom, avoiding unnecessary bad moods towards this holy synth which does not deserve them:
==>
http://www.arturia.net/downloads/arp2600v/testing/ (Mac & Windows)
Hope this gives a new positive start to the ARP2600V 2.x series!
Keep up the good vibrations,
Antoine.