IntelliJ - Spring Boot - Yaml Completion not working

Hi,

I have been an IntelliJ user for the past 6 years and I sincerely never had an issue which I never solved. Only this one is driving me mad. As the title suggests in Spring it is very likely to have an application.yaml file with properties and IntelliJ has always done an amazing job at helping complete these properties.

I use my personal license on both Windows and MAC depending where I am. On my Windows machine it always worked and completed these properties however after a yearly computer format, it just stopped working! On my MAC I never had any issues. In fact (and here is where it gets annoying) the same code repository with identical code (zero difference in code) the MAC IntelliJ works and auto completes the properties but the Windows IntelliJ just refuses to work no matter how many times I have uninstalled and reinstalled, how many times I have cleared the cache and restarted, how many times I restored the default settings and tried whatever solution people suggest on forums... I just cannot get it to work... I tried renaming from yaml to yml but no difference there too (not to mention that the same identical code base with yaml or yml works on MAC)

Please help - 

Desperate