selwyn wrote:

I am not sure if that will work, because I went back to my OE to
check if the missing Folders/Messages was still there and it wasn't!

Importing from OE or exporting from OE will NOT remove data.

Now I am not sure if
1. In the course of the migration it is still lying hidden somewhere
either in OE or Express, or

I don't think OE hides folders or messages in folders.

2. It has got permanently deleted by mistake.

I'll vote for this choice.

Also funnily I noticed that there are some Folders in My Documents
which are not something I saved... They look like dbx files but I am
not sure because I can't open them.

Neither Outlook nor Outlook Express whould have made these. It you see
them, then you created them somehow.
--
Brian Tillman [MVP-Outlook]