If you are talking about "WinReducer81.exe", it has been replaced by a newer software "WinReducerEX81.exe" (download file link in the WinReducer.net website). "WinReducer81.exe" is not any more supported !
So, with EX-81 (as well as with EX-100, for Windows 10), you are able to access to the complete Updates Catalog.
In other word, you need to use WinReducer EX-81 (or EX-100, for Windows 10) to download all Windows Updates and integrate them in your ISO.
PS : The EX-70 Updates Catalog is a work in progress (by not yet released), so it will be available really soon with a wonderful newer EX-70 build.
I wish you to have nice day !
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