As I have never had that problem, I’m just guessing. That said. Perhaps one of the following files is corrupted or has wrong permissions so that you don’t have Read & Write privilege for it.
/Users/you/Library/Application Support/Nisus Writer/Languages/English - British.nlang
/Users/you/Library/Application Support/Nisus Writer/Languages/English - US.nlang
(This is Nisus Writer Express forum, not Nisus Writer Pro forum. But anyway, IIRC, the files above are common to them.)
If it is a corrupted file, you will have to delete it and configure it in NWP’s Preferences again. If it is a permissions problem, probably you can correct it in Finder’s Get Info panel.
What happens if you move those files to another folder (don’t hurry to delete them: they may be innocent) before launching NWP?
But is the spell checker working in other applications, e.g. Mail and TextEdit? If not, that’s a system problem and we have to do a trouble shooting in another way.
Candace wrote:Recently added a new mouse, in case that could matter.
And did you install a mouse driver? Most likely yours would be a different problem but, several days ago, I installed a MS mouse driver (IntelliPoint 8.00, v.279) for my Notebook Optical Mouse 3000 and it makes my copy of NWP 1.4.1 misbehave, it seems. Selecting a macro under Macro menu with the command key pushed down should
open the macro file. However, if I have the MS mouse connected (which makes the MS driver active, I think), that operation runs the macro instead of opening it. Or is it just me?