I'm afraid, you can't. You must have TikVideoPoster standard first to be able to buy TikVideoPoster PRO. Even if you buy TikVideoPoster PRO without buying the TikVideoPoster standard you wouldn't be able to use the software.
Here is why:
1. TikVideoPoster PRO is an upgrade/up-sell of TikVideoPoster standard.
2. TikVideoPoster PRO enables the PRO features inside your TikVideoPoster software which gives you ability to upload videos in batch.
3. TikVideoPoster PRO is dependent on TikVideoPoster Standard.
4. TikVideoPoster PRO doesn't have an independent login to give you access to TikVideoPoster software.