[WriteLog] WriteLog 12.51K update--bug fix in ADIF export

[Wayne]

It has come to our attention that the recently-released WriteLog version
12.51J introduced an error in its ADIF export. Specifically it fails to
write the specified "RTTY" tag for RTTY QSOs. (It writes "DIG" instead,
which is not in the specification.) This affects not only ADIF itself,
but also LOTW export. The is fixed in 12.51K, which will install on any
system that has a valid registration code for 12.51J.

The download of version 12.51K is available at:
    writelog.com/writelog-versions

Wayne