Is it possible to update my unity 4.3 to 5.1?

Hello, I have a unity3d 4.3 version… I would like to ask if it is possible to update to 5.1 without downloading the whole 5.1 version? Because it would take time to download it, I have a slow internet here… Hope someone can answer

No, it is not possible, the only way is to “download the whole 5.1 version”.