TextMaker 2018 rev F978.0905 Will Not Open Old .doc file

[BillRK]

On my new Win 10 laptop I downloaded and installed SoftMaker FreeOffice 2018. I set Windows defaults to TextMaker for all related file types, including doc, docx, etc.
Now I am trying to open an older doc file using the file/open featureand get error "unable to open file". If I click Open in File Explorer, I get error "this file format is not supported".
The file opens perfectly by downloading into Google Docs.
I set the TextMaker default file format to doc. If I click Open in File Explorer, I get error "this file format is not supported".
If I run TextMaker as Admin, as I read suggested somewhere, I get the same result.
I downloaded and installed Apache OpenOffice. It opens this document perfectly!
What can possibly be going on here?? I prefer the menu structure of SoftMaker FreeOffice, but it is worthless to me if it can't open these files!

[SuperTech]

Please share the associated file in which you are getting this problem so that we can do further investigation for resolution.

If you want to send it to us privately, please e-mail us at the forum[at]softmaker.de

Please also include the forum URL of this topic so that we can trace your e-mail.
viewtopic.php?f=317&t=20540&p=68097#p68097

[Woody44]

Was there a resolution to this problem?

[SuperTech]

We are still waiting for the sample file so that we can investigate the problem.