If you see a File Error message with "(0x3)" when installing the Black Square - Commander 114 it may mean the installation is exceeding the 256 character limit in Windows.

If that's the case try the following:

First uninstall the Black Square - Commander 114 if you have it installed via your control panel > programs and features.

Then:

Download the Install_BS_Commander114_MSFS2024_v0.1.0.zip to your download folder. Its important you let it finish downloading. 

Once finished right mouse click on the Install_BS_Commander114_MSFS2024_v0.1.0.zip file and select "Extract All". Again let it finish unzipping

Then go into the new folder Install_BS_Commander114_MSFS2024_v0.1.0 and find the setup.exe file and double click on it to start the installer.

Then run the installer again but this time click on the "Custom Installation" instead of "Default Installation":

After that leave the path as default so it shows the following: 

Then install it by clicking on next.

After that check in your C:\JustFlight\MSFS2024 folder for the bksq-aircraft-commander114 folder and copy and paste that into your community folder (make sure its copy and paste and not "Cut and Paste" or "Move").

Then try the aircraft in the Sim to see whether it's working ok.

If so you can delete the JustFlight\MSFS2024 folder on drive C.