It seems that installing galaxy or being cautious when downloading files manually is the way. Annoying, but games with many files will last for longer probably.

BTW is there an easy answear to problem:
I can install GoG Galaxy but cant it run, start application. The win 8 just refuse to run the thing.
Somewhere in past i was able to run it, althought it might be different version, or i had reinstalled it or something.
This is why i downloand manually.

If you are not willing to use either gogcli.ex or gorepo.py, then you could use Free Download Manager 5. I've used that a lot to great success. Of course you need to click on every link, so not a one-click download. But at least it queues downloads and has some resume ability, and perhaps overcomes some download speed issues. Easy to check if you missed a link too.

I've set Free Download Manager 5 to capture links if I hold down the ALT key. So you need to install a browser plugin (addon) for that, as well as install the program.

It is perhaps the easiest manual download option.

You try DownThemAll!?