Cannot add new tracks to the library, using the top menu or ctrl-insert, as soon as I try the software becomes unresponsive and have to use "task manager" to exit, I am using version 12.4.14760.0 and MSSQL 2016
Good to hear that it got resolved. Thanks for the update.
We have tried to reproduce this behavior on three different machines, unfortunately with no luck. The adding starts and works as it should.
I would suggest you to try a clean install as described here:
If the issue remains after you have performed a clean install, please open a support ticket at http://support.imploded.com and we can assist you further.
Can you try to add a single folder wth just a few files to see if it helps?
Also will you get the same behavior with a Sql Server Compact database?