upgrade or uninstall Parallels Client-64 error

Whenever I upgrade or uninstall Parallels Client version 15.5.16465, it asks me for the original installation file, ASClient-x64[1].msi. In my case, it should be RASClient-x64-15.5.16465.msi. However, I could not find this file anywhere.

Could anyone help me to find a way to force uninstall or upgrade Parallels Client without this file? Or help me to find out where I can download RASClient-x64-15.5.16465.msi.
Many thanks.