Why is my browser and/or Windows is telling me that the installer might be a virus?

SCEditor's installers are not digitally signed. They are NOT viruses. If you are doubtful, you can verify with SHA-1 checksum of the downloaded file in question.

Why are not all chunks displayed?

Chunks in Survivalcraft that are not modified will not be displayed because they are not written to the world. To write chunks to the world, one must modify them in Survivalcraft either by placing or breaking blocks within the chunk.

Why aren't all worlds displayed when importing from Survivalcraft?

SCEditor cannot process worlds are not updated to latest Survivalcraft version (V 2.2). To resolve this issue, one must play the world in question in the latest Survavlcraft version to allow Survivalcraft to convert it to the latest version.

Why are all blocks displayed with their standard texture and color?

SCEditor does not have functionality to display painted blocks with their paint color, which is why the default texture for blocks is used. This is feature that is planned to implemented in the future.

Why are stairs, slabs, furniture, etc. displayed like standard blocks?

SCEditor does not have functionality to display stairs, slabs and furniture with block specific models. This is feature that is planned to implemented in the future.

Why does rotating and scaling regions create strange block orientations?

When SCEditor rotates or scales regions, it modifies block positions within the region. Orientations are not changed. Changing block orientations with region manipulations is a planned future feature.

Why don't changes appear in the world when playing Survivalcraft, even when changes were saved in SCEditor?

Saving in SCEditor only saves changes to the world within SCEditor. To make the changes appear in Survivalcraft, one must export the world to Survivalcraft via Export button.