Hi Tom,

i've reasearched further and it seem that 2.0.17 IS stable in Ableton 9.5. However 2.0.11 did seems to throw an error in Ableton but so did Max For Live, and the crash that I got after updating Ultrareverb to 2.0.17 came from Max For Live and not Ultrareverb, so all is good.

Thanks for you help and sorry for the alarm! 

Br,

Andreas

Glad to hear you got it working, Andreas!