I noticed when I double click the extension it install in a folder C:\Users\Usuário\AppData\Roaming\Aseprite\extensions\sprite-analyzer
I tried to ctrl+x from this folder and ctrl+v in the correct folder on steam folder and after this looks like is working. I dont know why the extensions to do this
D:\Program Files (x86)\Steam\steamapps\common\Aseprite\data\extensions