I have deleted one portable 4.4.1 application but not deleted the electrum data folder.
In terms of instructions, what I did was considered not wrong.
I assume you put the portable versions of Electrum 4.4.1 and 4.4.2 in the same folder.
Even if you delete the electrum_data folder, the folder will be re-created when you open the portable Electrum.
However I'm starting to worry that the Electrum portable version doesn't guarantee as much security as Electrum other than the portable version as I participated in the ELECTRUM discussion on a local board and I tried to link here the Thomas V topic I took from a local forum -snip-
A portable version of Electrum tends to be stored on flash drives or other portable drives. It makes it unsafe to use when the portable drive containing Electrum is used on several computers, some of which may include insecure computers.
In essence, when you use portable Electrum, ensure the computer you use to connect the portable drive/flash drive containing the
electrum_data folder is safe from viruses.