From the article:

“[The ‘Evil Dead’] extended cut will come out on blu-ray. Just a few hours ago we talked about the study and it seems that Halloween will be available,” Alvarez tells the site. An extended version aired in the UK back in early 2015 but was a mistake as the distributor apparently sent the wrong master for broadcasting purposes.

This is exciting news as fans have been wanting an extended version ever since the film came out and it looks like now it’s going to happen! We’ll be keeping our eyes and ears open for an official announcement with a release date.

I’m guessing here but since this UK version is now out in the wild, he was probably money motivated to change his original decision, seeing how popular it really is.