Potplayer screen stretching problem ?(fixed)

First of all, sorry if this question doesn't actually belongs here
but i've been surfing potplayer forum and it seems not that active there and some old post long time ago still left unanswered
so i guess maybe i can get a real quick answer here , sorry again 

Okay the problem is i'm getting some weird screen stretch issue while using  potplayer 1.6.47450, which is recommended by SVP official website
the screen always stretch either in window or fullscreen, i tried adjust everything via aspect ratio but can't get it fixed,
however if i just use kmplayer, the screen is always maintain it's correct aspect ratio, please refer to the attachment jpg to view the difference
one more thing is if i just forward or backward potplayer, the screen seems perfect for a sec but then stretch again, just like left right and top bottom get crop

so anyone have any clue about this?

edit: left side is pot and right side kmplayer

edit2:accidently disable svp and screen back to normal??now that's strange...

edit3: turns out frame crop settings goes wrong, set it to disable fix everything, my bad