We plan on releasing 4.0c Beta 1 this week. If you do not want to participate in the beta test right away, please check that your update channel is not set to "beta".
To do this, open the Help menu (green question mark in the top right) and choose About Logos Bible Software. If you are not using the default update channel, the About screen will tell you:

If you see an "update channel" listed, then do the following to opt out of the beta. In the command box in the main window, enter set update channel to default
Your system will no longer automatically update to 4.0c when it's released.

For anyone who does want to participate in the beta, we will provide instructions when the installer is ready to download. It will be a public beta and anyone is welcome to test it.