Amongst all the ordure flung in the general direction of Win10, I recall seeing complaints that upgrading to it "disabled" or removed some programmes. This was supposedly due to incompatibility issues, but many tech posts said that it was more a case of MS trying to oust competition. I think they had to back down, and most of these actions were subsequently reversed by later updates. I also saw many reports these programmes didn't always work properly afterwards, and folks had to re-install. This might explain your observations?
However, I may be wrong...