XF 1.2 Phrases Question

I have installed an add on which puts a navigation tab on my forum... I want to change the name in the tab but there is no option to do so... do I need to change a phrase for this, and if so how can I find the right place to change it? There are hundreds of phrases associated to the add on...
Thanks Brogan

The name shown on the tab doesn't show up in a search... the tab appears as soon as enable the add on and it has a name pre set with no option to change it...
It currently reads 'football betting game' and I want to change it to 'prediction league'. The add on is xf soccer, but there are thousands of phrases associated with it..

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