Always possible, but personally I've no problems with 1.37.
Anyway here is changelog of version 1 player "post 1.37":
Version 1.39.829
- video window border is now 'normal' again
- some fixes for WMV files encoded with screen encoder
Version 1.38.828
- config file is now saved in user home directory
- fixed problem with resetting aspect ratio when movie was paused
- fixed problem with aspect ratio in play list
- with some files there was no audio if EQ was enabled, fixed
- fixed problem with flipped video with some codec/files
- audio files won't be restarted anymore after resolution change
- some subtitle fixes
- fixed problem with YV12 color space ('strange' colors)
- won't crash anymore with mkv files and disabled subtitles
- some fixes for frame capture
- mute button wasn't working in full screen skins, fixed
- some other bug fixes/
(P.S.: If I remember correctly it was rather simple to remove ad-support from version 1.38.)