I get a message about a missing method:

Method not found: 'Void SharpCompress.Readers.IReaderExtensions.WriteEntryToFile(SharpCompress.Readers.IReader, System.String, SharpCompress.Readers.ExtractionOptions)'.

and then sourcetree fails to start.

Yes, I realise you've had several other reports and issued a workround. But you've closed them all off. You obviously have no idea how much this is going to upset your users.

You should remove the update until you've created something that 3.4.9 can update to, and if that's not possible, change the location of the updater and send an email to all your users advising them to manually update with instructions on how to do so.

I know that mistakes happen, but the way you're dealing with this one is not professional