yes reinstall. Your crash obviously corrupted the file in question. As mail and program are separate reinstalling does not affect it.

ldbook said

My computer crashed. After I restarted, I attempted to open Thunderbird and received an Thunderbird.exe - Bad Image message. It indicates that mozglue.dll is either not designed to run on Windows or it has an error. Should I attempt to reinstall Thunderbird? Will that result in the loss of my emails? Thanks for any help!

All good now. thanks for your help..