yes, new installation 3.6.9 causes error 0x800b0109
using 3.6.7 - and ignoring the "cant sync" message-window (minimize it)
and everything works.
there is something strange in the neighbourhood ;)

https://www.dropboxforum.co...ty_comment_203547955
К сожалению, охотники за привидениями тут не помогут =_=