I cannot have The Sims 4 downloaded on 2 users at once.

I downloaded sims 4 on 2 pc users with 2 separate EA accounts. Account 1 was downloaded without steam. Account 2 was downloaded with steam. The play button on Account 1 did not show while both users had the sims 4 downloaded at the same time. After deleting the sims 4 from User 2, it started working on User 1. After a year or so, I decided to try again to see if it would work. I downloaded sims 4 on User 2 using steam again. While the download was in progress, I opened the sims 4 on user one just to make sure I still had access to the game in case anything didn't work. I opened it in offline mode (unintentionally. I just didn't try to go online).

After the download completed, I tried opening both EA and The Sims 4 in User 2 (both in and out of steam). In all instances, EA opened on the taskbar and closed again within seconds.

I tried opening EA in user 1. (Had to close the game in the end to be able to go online.) I checked The Sims 4 and the play button wasn't there again. I checked the properties and saw that the app was reading the file from a steam folder instead of its original location (which I am unaware of. Prolly should have checked that before trying this thing again). Since my brother is the owner of User 2 and all the steam stuff, (I don't have steam or a steam account) I switched the EA account (Still on User 1, my user.)  to his account. The play button appeared (but it asked to log in to a steam account since it's playing from steam. I didn't log into my brother's account because I then understood why everything wasn't working and I also didn't want to be unable to play The Sims without steam installed, something my brother experienced some time ago).

I'm now guessing that EA is trying to open the game from the wrong location on my user and maybe there's more to it but I would like to know how to get EA to open The Sims 4 from a different location and see if that would work. Any other suggestions are welcome!
(Please don't ask me to uninstall it again because that thing uses so much data if I uninstall it my brother is never going to install it again with the amount of data which would have been wasted. Please and thank you. Thank you very much :).  )

Edit: I also want to mention that The Sims 4 was working perfectly from the time when it was downloading in the other user to the time I had to close it in my user to restart EA so it could be online.