This page shows Basic Configuration of LDInspector.
On first start, click "Yes", later select "Config." to open workpsace configuration.
On the first start, the configuration looks like this. Select for each part source: official or unofficial? files in a directory or in a zip? Most likely you will also want to configure a web resource cache directory.
In the end, your configuration will perhaps look like this. If unsure, leave colors unchanged. After "OK", save the configuration. If the filename is "LDInspector.ldi", this configuration will be used on future program starts.