
I write down these notes hoping it'll be somehow helpful for some users... and/or wonderful team of SolydXK maintainers

a) Problem: SolydX updatemanager always working finely (1 year or more)...
...but it's failing lately, since mid July 2016 with message:
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Errors were encountered while processing:
updatemanager
E: Command line option --allow-downgrades is not understood
b.1) Option 1: Update packages using Synaptic Package Manager
b.2) Option 2: Update with aptitude
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aptitude update
aptitude safe-upgrade
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...
apt-get install ntp
apt-get install openssh-client
...

c.1) UPDATEMANAGER BUG? : line 45 of updatemanager.conf file
containing the --allow-downgrades offending string :
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cat /usr/lib/solydxk/updatemanager/files/updatemanager.conf
containing a call to unexistent /usr/lib/solydxk/system/adjust.py :
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cat /var/lib/dpkg/info/updatemanager.postinst
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ls -ltr /usr/lib/solydxk/system/configobj.pyc
and could be useful from time to time... a systematic removal of orphaned .pyc files ..¿? IMHO.
Welcome comments, corrections, etc.