No it won't.

Thank you, it did not. Now that everything is converted to new computer it was working fine. I attached it to a different monitor and now have a new problem. I should say I have been using this monitor since february but with the older tower and no problems. Here is the new problem. Only new emails are displaying white text on a white background. Once I click on the message, it turns to black text and displays in the message pane as usual. When I write a new message, the top area (to/from) is ok. The bottom where you type the message is black background with white text. When I go in safe mode it is good. When I come back. It is good for a short while and then the display colors go off again. I copied my profile from old pc and it worked fine on the new pc. The only change was using another monitor. I also disabled all add-ons. I am at a loss! I am using TB 78.4.0. Any suggestions would be greatly appreciated!

Enable the Light theme to fix the white text on white background bug.

THANK YOU! THANK YOU! It all works now. This makes no sense. What's the point of all themes if you can't use them. Also, why would it just stop working. Crazy. But I will keep the boring light theme, as long as it works. Thanks again!

You can try switching back to your preferred theme, that is, Light theme > your theme. I've found that some themes inherit elements of the theme that was previously in use.