I found bugs in [File] menu, Export Logs/Export UQF(.asc) file.
As shown below, when I chose this menu the box showing
"Including this end date" isn't the present date.
Then, I pull down date selection window as shown below, it
is apparent that, in this section, L32 refers the last two digits
of system year for DAY and system day for YEAR.
It is 8:00 in the local time 1 hour behind 2019-10-15 00:00 UTC.
I think, you know why the present date of L32 is a day before UTC.
Next, the extension of UQF exported file is not .asc, but
it is .uqf as shown below.
The file name should be "20191014.asc".
This function is quite useful to export QSO records of
a certain station.
If possible, let me request to add callsign or country
selection appears in Exporting ADIF(.adi) file section.
ex JA0RYN, JA0RYN/7, DL/JA0RYN