A whole new profile visual editor has been coded the gif tries to show everything but it's a bit hard to understand without guidance:

In the properties section, players are able to set:

• The size of the image
• How many columns the tileset is going to have
• The tile that will be used as a no-image so it should be a transparent one
• The tile that will be used as a background, so the tileset will paint it when a new map is created

The layers are the different layers a map using the profile will have

The types is the sections of the tile, on this case we can see the sections are splitted between the floors and the objects

Alones, are single clever tiles, they can have a group so clever tiles thinks they are the same and don't break the tile. Example, cascade, so it's possible to place it in the water without breaking the water clever tile because they have the same group.

Squared, are the clever tiles that uses the shape, full, corners, and a square.

Lines, are the special rm2k and rm2k3 tiles that are used for water tiles.

Remove, these are tiles that are removed from the tile palette.

Here is also the process of importing RPGMXP type of files

And RPGMAce, MV and MZ too