By reinstalled, you mean the version of the game you had years ago? That would depend on the version, but you'll likely need to raid google as most people here are now on the Rebellion stand alone expansion.

If you meant you just got Rebellion, I don't know about planet logistics but yes there are mods to increase fleet sizes, either stand alone or often as optional features to biggger mods. The dev.exe also has an "ignore slot restrictions" option that basically lets you build as many ships and structures as you want. AI tends to go crazy with it though, I'd use it only on medium maps or smaller.