First - do not reply to the email sent by this forum. Instead, do as you did when you made your very first post and visit the forum website and login. That way you will see all the replies you’ve had in the order they’ve been made to you. You can then use the ‘Reply’ feature at the bottom right of the post you want to reply to.
Now back to trying to answer your question…
As already explained in other posts, if you install Gramps on your Windows 11 computer it will be able to read and import the family tree data that is in the GECOM file you have been using with GedHtree. Once you have the data in Gramps you will be able to edit it.
HOWEVER, learning how to use Gramps will take time and patience, especially given that you have said:
I suggest to start by watching this video about how to download and install Gramps. NB the version of Gramps used in the video is an old one but you should still be able to follow it and use it to guide you through the installation of the current version, which is v6.0.5:
Once you have installed Gramps, try this video about how to import a file into Gramps. NB the type of file that is imported in this video is not a GEDCOM file but the principle is the same:
