The latest version if Spring Tool Suite can be downloaded using below link,
On writing this post the latest version of Spring Tool Suite (STS) IDE is 4.9.0
The previous versions can be downloaded in below link,
This post will guide to install Spring Tool Suite 4 IDE on windows machine.
Download STS IDE
On clicking the above 4.9.0 windows 64 bit link, the spring tool suite self extracting jar will be downloaded,
spring-tool-suite-4-4.9.0.RELEASE-e4.18.0-win32.win32.x86_64.self-extracting.jar
Install STS IDE
Click the jar file and it will start to extract the files to a folder like sts-4.9.0.RELEASE.
Click the SpringToolSuite4.exe to launch the Spring Tool Suite 4 Workbench
By Default workspace folder structure will be,
C:\Users\Documents\workspace-spring-tool-suite-4-4.9.0.RELEASE
Change the default workspace folder if needed and click Launch to open the STS Workbench.
The Spring Tool Suite IDE can be used for developing Spring Boot Applications. Just click on Create new Spring Starter Project to begin with creating your first Spring Boot Application.
Instead of downloading a separate IDE for STS, Spring Tools 4 can be installed as a plugin in Eclipse. STS IDE is based on eclipse that has inbuilt features to develop Spring Based applications.