Integration with mindmanager, searching inside *.mmap

I just registered the following, which allow mindmanager document's contents to be indexed and searchable with windows search.

regsvr32 "C:\Program Files (x86)\Mindjet\MindManager 9\MmWindowsSearch64.dll"

However if i use the dopus 'find' tool
using clause 'contains', no results come up, but they do with windows search

Essentially, I would like an ad-hoc way for me to search inside the contents of .mmap files using dopus

On a general note, if file contents are indexable in windows search, does that mean they should be searchable using the dopus find tool?

Tools -> Find in Opus doesn't use Windows Search.

Using the Search field, top-right of the default toolbars, does, however. (Syntax is the same as in Windows Explorer's similar search field.)