As long as I can recall, you cannot change ship components but you can reload ammos and planes in HA.
This HA crash bug has been around for a while and it happens to the winning team. If you are driving IJN Atago, good luck with restarting the program, logging in, and then reloading the 90x3 ammos, 400+ torps, and 40+ planes in 2 min. Even with the extra 1 min before second, thrid. . . HT battles in HA (total 3 min), time is very tight.