I've cleared and reinstalled BRU and manually readded the regex again, but it's exactly the same. our AI friend suggested that the .NET/PCRE engine in windows has been changed in the current windows 11 release and thats why it may have broken - and to use the built in dll with BRU by enabling a legacy dll mode - but it's not in 4.1 from what i can see.
Has anyone else seen this problem? it's doing my head in! spent ages getting this working perfectly, and now it's gone to pot again