Thunderbird is a 32-bit application. However, 64-bit Windows 7 supports both 32-bit and 64-bit applications. What dictionary are you trying to install (link)? What is the exact error message?

The dictionary's here are not specific to OS being being 32-bit or 64-bit. https://addons.mozilla.org/thunderbird/language-tools/

There is no Win64 version of Thunderbird unless you are using a third-party build or built it yourself as Thunderbird for Windows from https://www.mozilla.org/thunderbird/ is Win32.

Hi, I go to tools, composition in Thunderbird and there is no dictionary listed in the box. I click on the bottom right hand section to add more dictionaries. It takes me to a window that has many dictionaries listed. I select English (Australian)Dictionary. It tells me that it is going to download the dictionary directly to Thunderbird, then it tells me it is a 32 bit program.I can only save it to my hard drive. I have transferred it to the Thunderbird folder but it still wont recognize the file. I am running windows 7 as my OS. What can I do?

Regards

Terry

Having re read my reply, I have incorrectly said that I click on the blue italic command to add my dictionaries on the bottom right of the screen. I should have said bottom left. Sorry

Terry

terry I have had trouble with the Aussie dictionary on and off for years. Do you get an issue if you choose the British (my backup choice) or US versions?

A screen shot of the error message might help also, so we can see exactly what you are.

Hi Matt, Thanks for the speed of your reply. I have attached screen captures of my process of downloading both Australian and English dictionaries.

Regards

Terry

You need to save the .xpi to disk and install it in Thunderbird, not open.

From the extension pages in https://addons.mozilla.org/thunderbird/extensions/ How to Install in Thunderbird

   Download and save the file to your hard disk.
   In Mozilla Thunderbird, open Add-ons from the Tools menu.
   From the options button next to the add-on search field, select Install Add-on From File... and locate the downloaded extension and open to install.

See also:

• http://kb.mozillazine.org/Installing_extensions

Hi Guys, Check attachment. My Tools Menu doesn't contain and "Add-on" selection. What now?

Regards

Terry

Hi Guys, I have gone into "Options" menu. Not there either. See attachment.

Regards

Terry

Better screen capture.

Terry

Hi Guys, I am 70 year old man trying to understand how I can install an English - Australian dictionary to Thunderbird in Windows 7 64 bit OS. You all have given me information that I don't understand. I'm looking for "Add-on" in Options men. Can't find it. Please, can you give me info and directions that I can follow? Remember I'm not as computer savvy as you guys. Could you please make your instructions a little easier for me.

Thanks

Terry

Just close the compose windows and your menu will have the entries the guys talk about. If your main Thunderbird screen does not have a menu, press F10 and one will be displayed.