Your won't find them in the folders.
They are burried in the "xxxx.MAP" files from the "database" folder.
The way I found th get rid of unwanted data is to...
1-Make sure they are not used in your specifications
2-Delete them
3-They won't come back until you takeoff an item in which they were used, like connectors, insulation, etc.
4-If they do come back, you will get a warning and you will know that that particular item has to be edited to replace the parameters that came back with the ones you want. Save it.
5-Purge database
Hope this helps