Download MahJong Titans for Windows 10

I tried that and it didn't work, this windows 10 sucks,

I don't know about any cases but mine.  I had a recent purchase of win7 Pro for my sys as an option to 10, but it had a free upgrade option.  I waited a while and read enough to go through with their online upgrade that came with a caveat that if you did not like it, I could revert back to my previous OS version.  So I gave it a go and it was equally painless.  But As I say, this was a 2015 Win7 Pro purchase that had the upgrade option with a rollback option.

Have to compliment MS as the process was few click painless, until I discovered an empty game folder!  well there are other things too about the 'tile mentality' that I don't favor but on this topic specifically I was just really astonished that the free games were gone.  I really, really, enjoy them for brain calibration, and maybe at times spent more hours in a day on them than any other application(s).  They worked well, were fun, and I was used to them.

How do we reinstall windows 7?

I've rolled back to Win7 and am happily playing the dragon :-)  setup, couldn't be happier!  What a hoot MS took away their own free games with no notice - that pretty low in my opinion and makes me wonder what else?  So as far as I have found if you enjoy mahjong titans as much as I do, just roll your OS back if you are within the period.

No, you can't download majong titans from the store.  There are several other majong suites available, some with adjunct purchase options/requirements attached.  I don't see anyway to get majong titans unless MS allows it since they apparently have opted for a third party distributor.