software installation - Manager Accounting update/install fails - Ask Ubuntu

tried update manager.io accounting program using ubuntu software center. update fails with:

the following packages have unmet dependencies:

manager-accounting: depends: libmono-wcf3.0-cil (>= 2.6.3) not going installed here 

now, cannot open manager. tried re-installing:

$ sudo apt-get install libmono-wcf3.0-cil reading package lists... done building dependency tree reading state information... done package libmono-wcf3.0-cil not available, referred package. may mean package missing, has been obsoleted, or available source following packages replace it:  libmono-wcf3.0a-cil libmono-cil-dev e: package 'libmono-wcf3.0-cil' has no installation candidate 

so, tried install replacement packages:

$ sudo apt-get install libmono-wcf3.0a-cil reading package lists... done building dependency tree reading state information... done libmono-wcf3.0a-cil newest version. 0 upgraded, 0 newly installed, 0 remove , 0 not upgraded.  $ sudo apt-get install libmono-cil-dev reading package lists... done building dependency tree reading state information... done libmono-cil-dev newest version. 0 upgraded, 0 newly installed, 0 remove , 0 not upgraded. 

that not resolving situation, reinstalled dependencies of libmono-wcf3.0-cil (source):

• libmono-corlib2.0-cil (>= 2.6.3) – mono core library (for cli 2.0)

• libmono-security2.0-cil (>= 2.6.7) – mono security library (for cli 2.0)

• libmono-system-messaging2.0-cil (>= 2.6.3) – mono system.messaging library (for cli 2.0)

• libmono-system-web2.0-cil (>= 2.10.3) – mono system.web library (for cli 2.0)

• libmono-system2.0-cil (>= 2.10.3) – mono system libraries (for cli 2.0)

all return installed latest versions.

any ideas?