Unable to delete transactions

[Kevin Hale Boyes]

I'm not sure what I've done but I don't seem to be able to delete
transactions anymore.
I select a transaction from the register and click the delete button
and nothing happens.
This is new as I've always been able to delete transactions in the past.

It seems this only happens for new transactions.  I've tried deleting
some older transactions and I get the confirmation dialog like I
expect.
So, for example, I can either create a new transaction by hand or, as
I've just done now, I imported an OFX file.
I'm not able to delete either of these transactions.

Is there any way to fix this so I can delete transactions again?

I'm running 2.2.9 on Windows.

Thanks,
Kevin.