Add punctuation: Before you can open a BTOA file youll need to figure out what kind of file the BTOA file extension refers to
A: Before you can open a BTOA file, you'll need to figure out what kind of file the BTOA file extension refers to.

Add punctuation: You keep 100 of the profitsFree Updates Information Future updates of the software will be provided to you totally cost free and this offer will also be extended for your customers
A: You keep 100% of the profits.Free Updates Information: Future updates of the software will be provided to you totally cost free and this offer will also be extended for your customers.

Add punctuation: A number of such rebirths will produce different stars which can explain that different types of stars exist
A:
A number of such 'rebirths' will produce different stars, which can explain that different types of stars exist.