To export keywords from Lightroom to ImageIngester:

1. In Lightroom, in the Library module, choose Metadata-Export Keywords and save the keywords to a file.
2. Click the Browse button below (it may have a different label), select the file from Step 1, and then click the Send button.
3. Choose File-Save (may be labeled Save Page As, or something similar) in your browser and save the resulting output to the ImageIngesterPro/Preset_Keywords presets folder as a text file (see picture below). Use whatever name you want for the preset (e.g., LRKeywords). The location of this folder depends on your system and is given in the User's Manual on or about page 76. (The page may vary a bit as the manual is updated.)
   
4. Launch or re-launch ImageIngester and you should see your preset on the Keywords drop-down list.

Note that ImageIngester does not support hierarchical keywords, so any hierarchical keywords in Lightroom are flattened to a single level.