Thanks for the feedback, zenrain.
I'm well aware that i'm not working as an admin user, as written in the first post. Using a user-local application folder is a solution, albeit one i do not favor (feels more like a crude workaround).
Regarding the addition of write permissions to /applications, please consider that this undermines basic OS security. MacOS prevents downloaded programs from unauthorized writing in the /applications directory, by explicitly requiring an admin account authorization. This is done in order to inform the user about the fact that a program is trying to change the locally installed executables, thus giving him a chance to prevent installation of code he did not intend to install. This protective concept is nullified by allowing arbitrary writing to the /applications folder from a user account.
Please forgive me if i sound too patronizing, it is just that even the simplest MacOS programs nowadays know how to install themselves with full MacOS conformity and for me it is hard to understand why PB follows a different path.
Thanks again & best regards