For many time I wanted to learn to use EPF but technical reasons always stoped me. Blame me because I'm not an Eclipse guy and I'm not into its eclipse-isms but until today I have not been able to launch it. Now, wirth this really simple recipe you'll be able to run it.

Initial technical scenario:

Then unzip the file and execute:

$ unzip epf-composer-1.5.1.7-linux.zip
$ cd epf-composer
[epf-composer]$ ./epf
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/olea/epf-composer/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.2.R36x_v20101019_1345/eclipse_1310.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
(Epf:27092): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",
(Epf:27092): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",
Gtk-Message: Failed to load module "pk-gtk-module"
Gtk-Message: Failed to load module "canberra-gtk-module"

If you, like me, don't know nothing about Eclipse maybe you are doomed because the real problem is everything but clear. What you are having is the EPF application asking for a 32 bits java VM runtime. Nothing more, nothing less. But now is very easy to fix:
  1. just get a 32 bits java VM
  2. adjust epf-composer/epf.ini to use it
In my case I've installed a Java 1.7 (in my case from the same Russian Fedora repo):

$ sudo dnf install http://mirror.yandex.ru/fedora/russianfedora/russianfedora/nonfree/fedora/updates/23/x86_64/java-1.7.0-oracle-1.7.0.79-1.fc23.R.i586.rpm
and then change ~/epf-composer/epf.ini from this:

-data
@user.home/EPF/workspace.151
-vmargs
-Xms64m
-Xmx512m

to this:

-vm
/usr/lib/jvm/java-1.7.0-oracle-1.7.0.79/jre/bin/java
-data
@user.home/EPF/workspace.151
-vmargs
-Xms64m
-Xmx512m

Please note the precise path may be different in your system but in any case it should point to a 32 bit java binary.

Then you just need to launch EPF and you are ready:

$ epf-composer/epf
Enjoy.