How to reproduce:
1. Open user's project
2. Select "Particle System" in the Hierarchy
3. Open Shape Module and Renderer Module
4. Enable Shape Module, tick "Align To Direction" and disable Shape Module
5. Try changing "Render Alignment" in Renderer Module

Expected result: Renderer Alignment can be changed when Shape Module is disabled.
Actual result: Renderer Alignment cannot be changed when Shape Module is disabled, but Align To Direction is ticked.

Reproducible with - 2018.3.0a4, 2018.2.0b11, 2018.1.7f1, 2017.4.6f1, 2017.2.3p2, 2017.1.4p2