This is probably old news now for most users here but I can now run my older version of Adobe apps again. Couldn't believe it when Photoshop and Flash CS5.5 opened with properly scaled UI this morning. Hope it helps someone who felt they'd lost their expensive older software purchases when Windows 10 came out. I just used the exact same scale percentage (150%) as the tutorial maker used. Apparently this scaling problem even affected more recent versions of Adobe software like 2014 / 2015 CC installations.