All these tests require the package openlpFull. In openlp they aren't used, as they are optional. When switching the video backend, it is best to restart OpenLP afterwards to make sure only the right ...

Open OpenLP and go to Tools > Open Data Folder... in order to find out where your data folder is located. ├── alerts ├── bibles ├── custom ├── images ├── media ├── presentations ├── projector ├── ...