Versions 1.6.4.1 and 1.6.6.c have been fully re-notarized and re-signed on mac!
Version 1.6.4.1 is an official version and 1.6.6.c is a beta, for more information on which you should use, please reach out to support@singularsound.com at your earliest convenience.
You must reinstall these versions, they are not the same versions you were using if you have experienced permissions issues. Once you reinstall them, no more issues should occur when trying to open the application, simply allow the app to open and select “Allow” for all the relevant permissions asking for access to external drives and memory.
Please let us know if you are still having issues with these versions.
Thank you!