Unable to install APK into fire tv with ES File Explorer

I have a new fire tv and I enjoy it a lot. I use ES File Explorer to install some android APKs on my firetv. It used to work fine in the past. However, for the past couple of days, ES File Explorer has discontinued that option unless we upgrade it to premium. The premium version costs $9.99 per month and I don't want to go with such subscription model. Is there an alternative file manager that provides such option? I use downloader also, but it can't be used to install any APK that I want. Apps2Fire did not work either as I have hard wired my TV with an ethernet cable and my mobile is on a wifi network. Moreover, I use ES file explorer for some other options such as to access the cloud drive, mount external hard drive etc.

If the old version of ES File Explorer still offers the APK install option, that could be an option too. I just need to know from where and how I can get the old version installed on my firetv.