Yes you can. make sure Manager/Docker is selected in the view menu and that soundpool is available in that view (right click on top of the manager docker or use the plus button).
The fact that your MM Soundpools are in mxcogg format suggests you actually have what is now quite an old version of MM. Or, if you have a recent version, that you have not updated your Soundpools. mxcogg was a copy-protected format that, I think, was readable only in MM. All current Soundpools are in either .ogg or the even better .wav format.
@denny7794 Which Soundpool? Third party loop packs cannot be added because they don't have the same structure as a Magix Soundpool and you need to load the files via the file browser.