I got some time today to play around with your new double-sized tiles:
FYI the kobold graphics has not been resized, it 's only 10x10.
The other thing, which comes down to personal taste is that I prefer the old ones with the smooth look to the new ones with the jagged lines. So I'll be using those for the time as default, and provide the alternatives to the user.
Maybe you have already see this, or maybe you can use this info to help with resizing in the future:
I just fixed the upload. Sorry for that!
As a good portion of my free time is spent emulating, I'm already using the BRh algorithm. I'll likely use it to resize when I have some more free time, as it does a good job of enlarging. It does a better job than scale2x and hqx, at least. I did maintain an archive of the old smoothed out double-size set in the meantime, and I do intend to bring the aesthetic over to the double-sized. It will still take some time, though, and I'm a little short on it presently. I'd want to clean the artifacts up. The text, for example, didn't fare well in the example image.
See personally I like the jaggy/pixelated look. Just keeps the ascii/console/terminal feel to it. But I'd be interested to see how you do it, I've yet to make it look good personally with some of my bigger sets, the over-smoothing has always looked awkward.
I'll probably maintain both double-sized sets in the archive, for the best of both worlds.
I hope the folder structure is working for everybody, as the number of tilesets grows ever larger. (24, after the two double-sized sets are done) Forking something to maintain my own user-friendly "tileset installer" is not something I want to invest the time into maintaining. There doesn't seem to have been any confusion so far, however.