Same problem with 3.5.2 on Windows XP.
1) I completely uninstalled and re-installed LO. 2) Created and saved a new file. 3) Closed and re-opened LO. 4) Looked at Recent Files list. It was empty.
I then deleted the folder C:\Documents and Settings\[user]\Application Data\LibreOffice
That DID fix the problem.
Same problem with 3.5.2 on Windows XP.
1) I completely uninstalled and re-installed LO.
2) Created and saved a new file.
3) Closed and re-opened LO.
4) Looked at Recent Files list. It was empty.
I then deleted the folder C:\Documents and Settings\ [user]\ Application Data\LibreOffice
That DID fix the problem.