Little mistake in the update notifier

[UmbertoGuitar]

Hi Elcallio

When an update is due like today and I click on "download" I end up on a 404 page.

Reason being that the dialog points to:
https://www.tx16wx.com/downloads/
rather than to:
https://www.tx16wx.com/download/

Just FYI

Keep up the good work!

[elcallio]

Thanks. Should work as expected now.