Solving with the H series goes faster then the G series. There is no speed difference between the 17 or 18 database.
If you have tow database, be sure you select the proper one in tab alignment (ctrl+A) or set it to auto. Then save setting from the file menu or just click on the solve button.
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If I have downloaded G17, Do I need to keep G18?
There is no disadvantage of using the G18 instead of the G17 except for disk space. The G18 goes deeper. But both are replaced by H17 and H18.
Unless your field of view is larger then 5 degrees, I would install the H18 or H17. The H18 is most universal. Uninstall/delete then the G17 and G18.
Han
Solving with the H series goes faster then the G series. There is no speed difference between the 17 or 18 database.
If you have tow database, be sure you select the proper one in tab alignment (ctrl+A) or set it to auto. Then save setting from the file menu or just click on the solve button.