This article concerns Mac OS X users only
We've been reported about this problem by several our customers already and we're doing all we can to fix this and release patch as soon as possible.
The reason the problem appears is that recently we've switched to entirely new installation building tool on Mac OS X, and seemingly it still requires some extra tunning when comes to dealing with file privileges, especially when built installer has to overwrite Audio Unit file (like in case of updating Sigmund 1.0.0 to Sigmund 1.1.0.
For the time being you should remove previously installed Audio Unit plugin to work around this problem. So if this concerns you follow these steps:
Library/Audio/Plug-Ins/Components folder
on your Macintosh HD and remove Sigmund.component
file.
~/Library/Caches/
folder and remove com.apple.audiounits.cache file from there
~ (tilde) means your user's home directory. Very often /Library
folder in user's home directory is hidden and you won't see
it normally in Finder. Then please select Go menu in
Finder tool and choose Go to Folder ... option.
Type in ~/Library in the window and Finder will open this hidden directory.
Then just browse to Application Support and continue checking.