Looking for a game, plz help

I am looking for a specific game, please help me if you can.

Originally I played this game on the Commodore 64 in the 80's. Then found it again on the PC about 8 years ago, but lost it.

I do not know the name of the game and the PC version was a different game with the same play.

Its a space strategy game. You start with 1 planet that produces a certain number of ships. You attack other planetes that can produce more ships. Computer or other human players can take turns also. And each player must defend his "empire" and build an armada of space ships to take over the other planets.

Some versions of this game allow for ships to be redirected after being sent some versions do not.

I want this game, doesn't matter if its a PC game, a commodore 64 emulated ROM, or Nintendo ROM.

Please tell me what system and name of the game is, if anyone knows.