App purchases from Android Market are linked to the Google Account used to make them. Provided you use the same account on the device all previous purchases will be available for reinstall at no charge.
Thanks slug,
That really helped me out, i did factory reset and i am able to reinstall all the my prev purchased apps without repurchasing them.
Now here is the update guys.
I mailed to the htc customer support regarding the sys crash after 2.3 rom update, they said do the factory reset which will definitly resolve the prob. And to backup the applications they suggested to download the ADAO file manager, and take the backup of all the apps installed.
I did the factory reset after taking the backup of the contacts and the apps.
I was under the impression that after doing the factory reset i will get the previous os version automatically, but let me tell you my dear friends that even after doing the factory reset i have the same updated OS version In my phone that is 2.3.3.
Then I realized that why the customer support use to call it clear storage or hard reset. It doesn't downgrades your phone it basically clears the previous patch and makes ur phone ready after removing all the prev installed apps and data and then restores the fresh patch iguess, im not sure.
But since last 4 hrs there is no sys crash, but im still watching it, i didnt installed all my prev apps, lets see if there wont be any sys crash today then i'll start installing my prev apps.
Those who would like to hard reset their phone please google it for the steps, but i will suggest to wait till my tomorrows update .
Thanks
Smeet sinha