I use LastPass on a lot of my windows program, but although I used to have premium, I always found lastpass for applications too annoying to use. This means that I usually have to search up the password manually in my vault, which I would be alright with, if LastPass gave me a different way to do. On the online version of the vault, there is no simple copy password utility, and I either have to wait for the password promt to load and manually enter it on the LastPass website or navigate through the browser to activate the extension. My other option is the Windows store app, which, while I personally like and even for use cases like these, prefer getting apps from the store, is awful. It hasn't gotten a design refresh in years, and it is featureless and unintuitive compared to the web vault.
Please, either update your windows store application as a modern UWP app or make a non-store application will one-click vault access.
Although this may seem like a small issue, when you are using lastpass for years and use multiple application passwords a day, it really adds up into a major annoyance.