Undeprecate 'set -g @tpm_plugins'

docs/tpm_not_working.md

@@ -14,6 +14,32 @@ Here's the list of issues users had with `tpm`:
 - ZSH tmux plugin might be causing issues.<br/>
   If you have it installed, try disabling it and see if `tpm` works then.
 
+> Help, I'm using `tmux -f /path/to/my_tmux.conf` option to start Tmux and for
+some reason plugins aren't loaded!?
+
+[Issue #57](https://github.com/tmux-plugins/tpm/issues/57)
+
+`tpm` has a known issue when using alternative config file with `-f` option.
+The solution is to use alternative plugin definition. Here are the steps to
+make it work:
+
+1. remove all `set -g @plugin` lines from tmux config file
+2. in the config file define the plugins in the following way:
+
+        # List of plugins
+        set -g @tpm_plugins '          \
+          tmux-plugins/tpm             \
+          tmux-plugins/tmux-sensible   \
+          tmux-plugins/tmux-resurrect  \
+        '
+
+        # Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
+        run '~/.tmux/plugins/tpm/tpm'
+
+3. Reload TMUX environment so TPM is sourced: `$ tmux source /path/to/my_tmux.conf`
+
+The plugins should now be working.
+
 > Weird sequence of characters show up when installing or updating plugins
 
 [Issue #25](https://github.com/tmux-plugins/tpm/issues/25)