Why don't I have a mode select in the Particle System's Texture Sheet Animation module?

I want to import a custom made particle sprite but when following a tutorial I noticed that I’m missing what seems to be an important part of the module(The ‘Mode’ selection). Can anyone explain why I am missing this or how I can get it to appear?
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WHat unity version are you using, i have found this:

Functionality of Texture Sheet Animation module changed in Unity 2017.1