Just tried to install the ISF Editor since upgrading to 14.6.1 and when I try to install the ISF editor I get this error
Cannot open extracted file “/private/var/folders/hs/ zvjpgp4n6tb92c1wv50xbq780000gn/T/remoterepo-juAeJy/
com.vidvox.ISFFiles.mac/installscript.js” for reading: No such file or directory
Strange, when I look on the VIDVOX site ISF, version 2.9.15 is just listed for Mac as standard and as a beta!
But I think ProjectielObjects will respond to your problem during the day.
I work on Windows (Version 2.9.14.0 beta) myself and am just an ISF user without any real in-depth knowledge. The version number you specified surprises me. If you urgently need the software, uninstall the faulty version, download the original 2.9.15 to work in betwin from the VIDVOX website ISF and wait until ProjectilObjects comments on it.