Since both .lsd (source) and .lpd (document) files originate from the LECTURNITY recording software, it is likely this program is your best bet for your converting LSD to LPD. No 3rd party software capable of handling these files is known to us.
Convert LECTURNITY presentation file source format to Lecturnity multimedia presentation document file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert lsd to lpd on Windows
A screen recording software
Convert from lsd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.