SHACKLOG can export your log, or a portion of your log, in ADIF format. ADIF format is used by Logbook of the World (LOTW) and other software such as BV7 QSL management software. The log portion can be a set of contiguous QSOs or the reaults of a log search aginst specific search parameters.
SHACKLOG can import a QSL report from Logbook of the World (LOTW) and update the QSL received data in your log.