Help with my belkin rt3200

Hello everyone i just purchased, the belkin rt3200 i flashed the router with openwrt but now im stuck on the snapshot version rl7114 which is also limited, it wont allow me to install wireguard or do anything. i would like to get rid of it and install regular version of openwrt but when i tried to upgrade from flash file it just returns back to the same old snap version

If you're running the installer you must sysupgrade to a regular version without saving settings.

After that, the method I use is the attended sysupgrade.

On the CLI with the router connected to the Internet, opkg update and opkg install auc. Then run auc and it should ask you to confirm update to the latest version.