Intellij patch update when fails in IDE. (for 2018.2 and above. windows only.) place in your jetbrains IDE directory, and run it.

intellij-patch.bat

@ECHO OFF
SETLOCAL

REM Keep it if you placed this batch file in IDEA base directory.
SET BASEDIR=%~dp0
REM Keep it if you are using default installation. but don't forget to check your config folder named by Jetbrains IDE.
SET PATCH=%userprofile%\.IntelliJIdea\data\system\tmp\patch-update\
REM If you are using portable installation with portapps.io, comment above by prepend REM, and uncomment below by remove REM
REM SET PATCH=%BASEDIR%..\data\system\tmp\patch-update\

REM manual patch by parameter. you can run with specify patch jar path if you downloaded manually. 
IF EXIST "%1" (

ECHO APPLYING PATCH %1
SET PATCH=%1
GOTO PATCH

)

FOR /r "%PATCH%" %%i IN (*-patch-win.jar) DO SET PATCH=%%i

IF EXIST "%PATCH%\*" (

ECHO PATCH FILE %PATCH% NOT SPECIFIED.
PAUSE
GOTO END

)

IF NOT EXIST "%PATCH%" (

ECHO PATCH FILE %PATCH% NOT EXISTS.
PAUSE
GOTO END

)

:PATCH
ECHO.
REM If you didn't set java with %PATH%, you must specify java path manually below.
java.exe -jar "%PATCH%" %BASEDIR%
PAUSE

:END