How to reproduce:

1. Delete Unity license files (.urf) located in C:\ProgramData\Unity
2. Create a .bat file containing this: "C:\Program Files\Unity 2017.3.0a5\Editor\Unity.exe" -projectPath C:\empty\project
3. Edit the first path to where your Unity launcher is located, and the second one to any project's directory
4. Launch the .bat file that was just created
5. Click "Continue" if any "This may require re-import." prompts pop-up, wait for it to re-import
6. Observe that the project is not opening

Expected result: Unity opens the License management window, or at least shows a message that license is missing and it's impossible to open the project
Actual result: No messages shown. Sometimes Unity is running as a background process (no visible window), other times it's stuck displaying the splash screen

Reproducible with: 2017.3.0a5, 2017.2.0b8, 2017.1.0p5, 5.6.3p1, 5.5.4p3