where do I get su 1.3.3 or 1.4 and is it better than dx 50 1.6

I recently purchased the dx50 mainly on the reviews I read on this website I never realized they had quality portable music players other than apple, anyway I purchased the dx50 knowing it had some software flaws but from what I had read it is an excellent player that keeps getting better with...

my name s john,just  joined today after purchasing the ibasso dx50 works fine out of the box, was able to add some music files but I'm a little disappointed   that there is no documentation included any idea where I can get a copy my computer no longer will recognize the dx50 it worked the...