RCP: 0.7.8, file access rights not correct after TXM update

After setup, TXM installed components are owned by root:txm.

After an update, some TXM installed components are owned by user:user.

All TXM installed components should be owned by user:txm to allow all users to access and update TXM at any time.

(from redmine: issue id 2319, created on 2018/01/12 by Serge Heiden)