Unfortunately, you can't install opera stable, beta and developer at the same time from the repos.
I had to install opera stable 98 from flatpak, beta 98 and developer 100 from the repos, but now I can't upgrade to beta 99 (manually, not in the repos yet) because of conflicting files (see https://forums.opera.com/topic/62356/opera-99-beta/3?_=1684003600733 for details).
While both Opera GX and Opera One are closed, in both "C:\Users\yourusername\AppData\Roaming\Opera Software" and "C:\Users\yourusername\AppData\Local\Opera Software", delete the "Opera Developer" folder. Then, make a copy of the "Opera GX Stable" folder and rename the copy to "Opera Developer". Then, start Opera One.
@thatoneunoriginal Update: It appears it happens only on my main (laptop) monitor which is why it looked like it only happened when moving it from one monitor to another. (IDK if I can (or how to) edit the title to reflect this so yeh)
@d3m1tha Ok. Using the directions from https://forums.opera.com/post/308385, the custom URL you use in the New Tab Start Page extension to load the Speed Dial 2 page is chrome-extension://jpfpebmajhhopeonhlcgidhclcccjcik/override.html.
Don't mean to water down this topic, but going forward (i.e., Opera NextGen), we highly recommend Opera's Leadership establish a Customer Advisory Board (CAB) comprised of Opera Leaders, Developers, and select Customers to determine what's best for Opera and the community. It has been done, and can be done, successfully.
Hopefully, Opera Leadership is taking note on this.