How do I slow down the playback of the macro?

Open the program and click on Options | Preferences | Playback. Select the Delay after Keystrokes option, set the delay to 5000 microseconds and save. Try the macro. If it is too slow, reduce the delay or increase if you still need it to go slower. The slowdown should help the macro be able to finish completely.

To slow down individual macros, edit the macro and insert the Speed command at the beginning of the script. Set the delay to 20 or 30 milliseconds. Edit the delay if it still plays too fast or is now too slow.