Problem updating 3rd party pack

[rat_poison]

I'm running Technic Launcher Beta Stream (v4.301) on linux

 

Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Linux ****** 3.13.0-53-generic #88-Ubuntu SMP Wed May 13 18:10:29 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

 

I want to update 3rd party "The 1.7.10 Pack" to its latest version, so I go to the appropriate modpack options dialog box, I click on the desired version and I press "Update Pack"

 

A new java dialog box opens asking for confirmation and when I click yes nothing happens.

 

Is this a known issue? Is this the correct place to report such a bug?

[Munaus]

after you clicked "Yes", did you close that pop-up window and see an "Install" where "Play" should be on the Modpacks selection?