Created attachment 15498 [details]
wrong.log

If my config is :

shadow: format = most_et-backup_%Y.%m.%d-%H.%M.%S

then everything is ok, but if I use this:

shadow: snapprefix = ^\(most\)\{0,1\}$
shadow: delimiter = _et-backup_
shadow: format = _et-backup_%Y.%m.%d-%H.%M.%S

then the win can't see then previous versions. In the log files every two versions looks good:

FSCTL_GET_SHADOW_COPY_DATA: 2 volumes for path[GDBS.his].
  Label[0]: '@GMT-2019.09.26-16.45.07'
  Label[1]: '@GMT-2019.09.26-16.16.51'


but the second not work. I attach the good and bad log files.