BlynkSimpleEsp8266.h error

Hi, i’m trying to configuring my esp8266 (with the examble esp8266 standalone) but the arduino ide gives me an error.

ESP8266_Standalone:37:32: error: BlynkSimpleEsp8266.h: No such file or directory
 #include <BlynkSimpleEsp8266.h>
                                ^
compilation terminated.
exit status 1
BlynkSimpleEsp8266.h: No such file or directory

i have already installed the release v0.5.4
someone can help me?
thx
p.s. arduino ide 1.8.7