Just ran into this issue and cut back the time period to reduce the number of entries listed and the button appeared. Since I was moving them all for that time period, I moved them then advance the time a month and clicked the all button and moved them and did that about 3 times until I was at the original time period.
There was nothing keeping it from working so it appears there is a limit on how many transactions it can do at one time. I suppose given it can't even line the check boxes up right and the scroll is glitchy, I should be happy it works at all.
