Is your old PC available? (There are no magicians here, I think

)
If yes, simply go to your profile folder (you can find its address in the Preferences->Privacy&Security->Cache tab where it is shown as 'Cache folder')
and find file bookmarks.html - that's it! Just copy it to you new KM installation in the same location (working profile folder).
_____________________________________
Using
K-Meleon-1.6.17db+ /
KM-16-S2014
1.6beta2.5 by JamesD
______________________________
Recommending K-Meleon Twin+
Try and
discuss it!!!