I recently used a mod. that changes these weapons:
Bazooka
Poison Arrow
Cluster Bomb
Gas Canister
Banana Bomb
Holy Hand Grenade
Air Strike
Bovine Blitz
Dynamite
Old Woman
Prod
Tail Nail

But I tried W4ModLauncher and it says that I need to reinstall the game but I don't know how the mod. work'd and I have the edited weapons but I want to recover the Bazooka and the Dynamite, the rest is fine, but I cannot see the ''Icons-Change'', the Holy Grenade is supossed to be a Time-Bomb (Dynamite with timer) but it looks (The Icon), still, like a Holy Grenade!

How can I fix these things?

If you're talking about WormsTweak2, I haven't implemented the icons in there, so it's normal that you don't see them.
If you want to recover the Bazooka and the Dynamite, go in WormsMods/WormsTweak2/Tweak/WeapTwk and delete kWeaponBazooka.twk and kWeaponDynamite.twk.

Thanks! But are you going to make a newer version? Like with icons? That would be great... well... If you can...