[your24hourstore]

wont hurt to and you can always create it again if you want, just go in admincp/settings/option and find style and language i think, select your new style as default, then it will be, then if you still have trouble you can go into styles and templates and actually delete the old default style, this of course forces the new style throughout for sure

if later you need to remake the default you can

with this a guy showed me
In admin Go

Styles & Templates>>Style Manager>>[Add New Style]

Parent Style = No Parent Style
Title = Default
Allow User Selection = Yes
Display Order = 1

Save