How to open MHT files not in Internet Explorer
Thanks to everyone for participating in this thread!
Hi ChiefBrian ! Please note, that the SmartBear Community is a community of TestComplete users, so, the account you mentioned is just a name a community member decided to use and not an official SmartBear account.
If the replies by the community members didn't help, please consider opening a support ticket here.
As for your initial question, IE is the only way to open it, indeed.
Please also take a look at this article - https://support.smartbear.com/testcomplete/docs/testing-with/log/working-with/exporting/index.html
However, it won't allow you to export as a single file still. The best way to proceed is to archive the html log.