According to another report received today I'm not sure that the lastest ISOs will fix the problem and I will do better checks for this problem in the next days.

openmamba provides a standard system layout and libraries so installing third-party distributed applications like Chrome and Slack should not be a problem. Should you have any dubt or problem you can of course open a specific topic in this forum.

I finally managed to download a copy from your direct link and install that. There were 389 updates and this time it rebooted to a desktop. Thereafter though my wifi had disappeared (no connections available) so I connected using a cable and searched for anything network related via the package manager and also installed LibreOffice. This took almost another hour with various packages being cycled in the package manager which is hardly intuitive to follow. The result was still no wifi despite trying a couple of dongles in addition to the built in card. Google Chrome I installed OK from a downloaded .rpm package but trying Slack using the same method threw up a package conflict. I keep a copy of a terminal command to install Slack ignoring dependencies but when I tried to open it I discovered LibreOffice does not launch. From terminal it gave a 'depreciated' error with no 'Mokka' theme available. Unfortunately at this point I gave up.