Just reporting what looks like a small hitch or oversight.
qtVLM ouputs
<wpt lat="43.272917" lon="16.518167">
<name>HR_Brac_Uvala_Blaca</name>
<desc>NNW to enter<desc>
</wpt>
while the correct one should be
<wpt lat="43.272917" lon="16.518167">
<name>HR_Brac_Uvala_Blaca</name>
<desc>NNW to enter</desc>
</wpt>
see <desc> closing tag instead of </desc>.
openCPN does not log the error and fails to import any mark.