Style format has changed

I have been working on a colleague’s paper and totally messed it up.

I tried to insert references using the ECAP style (Euro Child Adol Psych.ens) and in the Word document this has now formatted with the references appearing in the reference list in alphabetical order. The numbers in the paper are therefore not consecutively ordered as they are supposed to be.

We have tried redownloading the style but the style is now not even appearing in Endnote.

Having worked in one document today, my colleague has opened up another document which had the correctly formatted ECAP style and opening this has now changed the style for her other paper too.

Any help very much appreciated. Thank you!