Depending on what you are trying to accomplish, there may be an easier way to get what you want.
eBay has changed the Purchase History and Summary pages -- the default for orders is no longer the last sixty days, but the last three years.
Some older, previously hidden items are apparently no longer hidden due to the change, though it is still possible to hide those transactions again.
One possible quick workaround is to bookmark a page that shows recent transactions, hide the transactions you want to hide, and then use the bookmark in place of eBay's link unless or until eBay fixes the old link.
