Is it possible in Transaction Log 7.1.45 to multi select rows to generate a custom Undo script?   When I Ctrl-click to highlight multiple rows in blue, the Undo script tab window updates to only Undo the last selected row.     The Export Undo Script option creates a script with all the rows in the window, not just the rows I have selected.

Your competitor Apex SQL Log has this functionality, they have a checkbox next to each row so making multiple selections for an Undo script is quite easy.  Unfortunately they haven't updated the product for compatibility with SQL Server 2022...