Mozilla Thunbderbird spell check problem

[Broadback]

I have 2 dictionaries in spell checker, English US and English UK. I have always had these, now for some reason when I select the UK version it is fine, but next time I open Thunderbird it has reverted to the US version. How can I stop this, or even delete the US version leaving the UK one alone?

[Gary]

http://kb.mozillazine.org/Dictionaries_(Thunderbird)

[Simon]

You can select the default dictionary, and add or remove other ones in Preferences / Settings.  I can't point you to exactly where at the moment, but I'm sure it's not hard to find.  Possibly under Composition in Settings?

[peasblossom]

Try edit, then preferences then click on the spelling tab. HTH.