Refresh POT in PoEdit

I created a POT to translate my website and generated a MO file.

I created a new project and improted from POT file, during the translation I noticed a few errors on my original POT.

I made the corrections and now I want to "refresh" the POT file, to update my开发者_StackOverflow社区 translation project without lossing all the translation I've done.

How can I do this?

---

Use msgmerge. Everything is explained in the GNU gettext manual.