set time
 

how can I set the time using bash?

You can do it manually with:
date --set="whatever the time is now"

Or to set it via ntp then use ntpdate.

When setting it with the date command, to store it you have to also use

/sbin/hwclock --systohc

You get your post closed in Linux General so you repost in Newbie!!!?
Anyway, I would be amazed if crossover is so dumb that you can just reset the time and have the program forget when it was installed.