I don't know which one do you have, but for mine I just have to do this:
www.dropbox.com/s/jylakq9bev6i…

Of those 3 options, whichever you prefer I hope it helped

Yeah exactly ^^ is there where you have to set it (Settings > Choose interactive windows). To make the Shimeji interact with specific windows, such as Firefox, Chrome, Skype or any other, just press ADD, and write the name of the program there, ACCEPT and DONE!

The thing is that the Shimeji reads the "label" of the windows, not just the programs that run them, so imagine you have a Skype window of a friend called Marina. If you just add "a" in the interactive windows list, all the windows that contain an "a" will interact with the shimeji ^w^ so if you want your shimeji to interact with everything, just add few vowels there to make sure all the windows will be able to interact!

hmmmm I guess you didn't install the correct version of Java that should be the error. If you have Windows 7 or previous, install the 32bit version without minding if your Windows is 32 or 64. Shimeji work better on 32bit Java~ this won't affect your computer, but it may affect other games you may have like Minecraft or things like that, since they need the matching 32 or 64 with your windows. But well, is not a drama, I guess there are ways to have both installed somehow if you had this specific compatibility problem with other games xD

Apart from this, you shouldn't have any problem ^^

Try to make a "Open with > Java" from the secondary menu of your mouse. If this happens is because sometime in the past you did a wrong step installing something

Hi well, depends on how will you "use it". If you are going to trace I will give an instant negative. Another thing is if you want to "copy" the proportions of the character for using it on yours, that's not a problem. Same for poses, if they inspire you to make your owns, that's not a problem neither. But well, in any case, I would like to see a sketch of what do you mean by "using this shimeji" before giving you a green light I hope you understand

if someone commissions it yes xD otherwise I don't have time enough for it~ I wish I had time to do lots of Pokémon, specially Eevees

you don't need it. Use the .jar file

.jar is enough, this version of shimeji doesn't need exe at all