möglicherweise kann das hier helfen:
Tools > Options > LibreOffice > Advanced > Open Expert Configuration
Search for: UseSystemFileDialog (Found under: org.openoffice.Office.Common > Misc)
Double click or Edit to change "true" to "false"
Click OK
Tools > Options > LibreOffice > Advanced > Open Expert Configuration
Search for: UseSystemFileDialog (Found under: org.openoffice.Office.Common > Misc)
Double click or Edit to change "true" to "false"
Click OK