Laz 1.8.0 is a bit outdated. Does it have the Online-Package-Manager (OPM) on-board? You find it in menu "Package" at the bottom. Please report back if you don't have it, I'll give you instructions how to install it then.
After you opened the Online-Package-Manager, scroll down until you see the entry "FPSpreadsheet", check it and click "Install" - that's all. During the installation you must confirm to rebuild the IDE, and after a while the IDE restarts and you have the spreadsheet components on the palette.
I should note that the OPM version is not up to date with the current development version, but since there is not much activity here at the moment the differences are not too big.