Hi Jude,
You cannot delete those locations. I highly recommend not deleting other continent/country locations either. There is simply no need to do such and it may adversely affect many BD functions.
You say that "when you compile a checklist, every country was appearing in the checklist". Can I assume that by "compiling a checklist" you mean creating a Checklist Report using the Reporting window and the Checklist TAB? The solution here is to simply always specify the location you want in the location field, e.g. Australasia. It remembers your setting and it will be there the next time you bring the window up. Nothing for you to forget.
That is the best advice I can give on this one. Removing locations from the location tree is not a recommended solution here.
If you want to restore your location tree to its default initial BD settings, simply import the attached file below using the Import/Export window in BD, and the Locations TAB. Recommended. It will not remove or alter existing locations you have setup. Just restore the rest of the World in the location tree for locations you have deleted.
Let me know if I can assist further.
Jeff |