I followed these steps and received an SQL error on the acymailing_geolocation table during the conversion:
tca2015_acymailing_geolocation CONVE
MySQL said: #1071 Specified key was too long; max key length is 1000 bytes
I did try to install in spite of the phpMyAdmin error and did receive the same error as before the collation change:
Row size too large (> 8126). Changing some columns to TEXT or BLOB may help.
In current row format, BLOB prefix of 0 bytes is stored inline.
Perhaps the screenshot of
will shed some light.