XnView Software

There has to be good reason why there are two versions, MP and Classic; taking that into consideration, if I have both installed on my Windows 7 machine, keyword-tag wise, will one version recognize whatever may have been done in the other version including the tag tree heirarchy ?
So many image organizing programs have the extremely annoying "feature" of automatically creating any tags that may already be in a file's metadata while disregarding the tag tree structure; this behavior makes me have to not only associate the proper tag, but also find and delete the one automatically created.

Thanks for reading and all help is appreciated.

XnView Classic uses only a database to store keywords; XnView MP uses XMP metadata & database, so it's not the same way to manage keywords
If you store your keywords as IPTC in the images both XnView MP and XnVie Classic will recognize them.