nothing wrong with filelinked app
for me thou, I like loading apps straight from a apk file (side-load thru a File Manger or ApkInstaller/AppInstaller).
I made a mistake thou and called the one seen with the Dreamlink as a File Manager, but it is seen in My Apps as a
File Browser.
Open that and with a USB device inserted you will see an Option labeled as 'Store' (short for Storage).
Open that and you will be able to install apk/app files.
The T2 has the full ability to do this, with the correct Manager/Browser/Installer.
I like the File Browser on the Dreamlink because when you open a USB storage device thru that Browser, you can do many things right there in the opened menu (without having to exit menus and enter other menus to find the function you want).
If there are apk/apps in there then they can be installed, or text in there that can be read or pictures in there they can be seen or movie files in there they can be played... all this done thru one menu. Unlike other Managers like Total Commander or File Explorer like ES EXplorer or FS Explorer. them managers are complicated but they are very powerful and can do many things, which the simple File Browser can not do.
Where as an ApkInstaller is similar to the 'simple' File Browser in that it gets straight to the job at hand without alot of other choices and functions to get thru.
Here is some info, which from the Buzz forum but is all relevant...
http://iptvtalk.net/showthread.php?36524-Buzz-TV-Box-File-Browsers-Managers-and-AppInstallers
For more functionalities, the Total Commander (which is found in both Dreamlink Markets), seems to be is the best to use out of the ES Explorer FS Explorer or other similar Managers.
http://iptvtalk.net/showthread.php?42025-A-look-at-10-Android-File-Manager-Explorer-Apps
http://iptvtalk.net/showthread.php?41820-FX-File-Explorer
I never wrote up a review of the Total Comander but the next link will show you some stuff that it can do
http://iptvtalk.net/showthread.php?42206-Dreamlink-T3-Copy-and-Paste-functions-explained
Your T2 should have the File Browser preinstalled.
Find it in My Apps and use that to install that .apk file.
Your second Market (Apitode Market) should be accessed with the yellow button and 0852, this is correct but you first must already be in the original Market menu for it to work.
Same with exiting the Apitode Market, but use the Green button with no passcode needed.
In them Markets, look in the category 'ETC' for most installer/manager apps