Is there any way I can download MCPE on my PC?

Log into Minecraft.net using the credentials for your MCPE game, and download a copy of "Minecraft Windows 10 Edition".

MCPE is discontinued currently - its successor is Bedrock Edition, a multiplatform version of Minecraft, in many variants for different platforms but sharing the same account/purchase, and enabling cross-play between them all - if you purchased a Bedrock Edition (or the MCPE predecessor) you can use it on any supported platform (though play on only one at a time). The different platform variants of Bedrock have their own names; "Minecraft Windows 10 Edition" is the name of the Windows 10 variant.