For issues you find with the Switch and Console releases, please follow this link and give as much detail as possible. This is the speediest way to get info to Pipeworks and get a hotfix in the works.
1.4 will bring many changes to the PC version. We strongly advise making plans to back up your worlds and players prior to updating your game. More details here.
Begin your search for Journey's End information here and here. Please report bugs and issues for Journey's End here.
For issues you find with the Mobile 1.3 update, please follow this link and give as much detail as possible. This is the speediest way to get info to DR Studios to look at your issue. Also, some troubleshooting hints here.
The .exe is built outside of the current directory.. it should be in a folder like "build-Terrafirma-Desktop_Qt_5_12.." in the same directory as the main Terrafirma folder. So go into that folder, then go into release, and copy the .exe into the source folder.. of course you only need to do this to build the .msi. If you just want the .exe, copy it anywhere and run it.