I have an older version - downloaded about 3 months ago. Should I upgrade and download a new version of my wallet? I still have the seed of the old one.

TX fees? What does 'TX' represent?

With regard to upgrading my wallet: Would I be able to keep my coins?

Okay. Thanks for the help from you two guys.
Regarding my wallet and the issues in question - is there anything I should be worried about?

On the tool bar of my wallet - the word 'Coins' has appeared! It's never been there in the past.
Any ideas as to how or why 'Coins' has suddenly appeared?

When I opened up 'Coins' two small amounts of bitcoin were revealed. The transaction fees for spending these coins would far outweigh the value of the coins. How do I delete these coins?

Also, when I opened 'Addresses' some of the 'used' addresses had the number 2 next to them underneath the heading 'TX'. Can anyone explain why the number 2 should be next to these specific addresses?

Any help would be appreciated.

Thanks