[windows 10] The close button on Illustrator has gap in the corner - and when your mouse goes to the corner (which it usually does when you want to close a window) - you are clicking on thee X button of the program beneath it. ...This is very furstrating and i just closed other software where i lost an hour of work. Adobe this is sloppy - Photoshop has simillar button, but the gap is closed, while for example - After effects uses the normal windows 10 border ....make this stuff the same! Such differences are acceptable from free software, but for such high priced thing like yours that's just sloppy!