looks like your config.ini is missing from the configuration folder under the studio install directory. Try creating it and add the below things in that
#This configuration file was written by: org.eclipse.equinox.internal.frameworkadmin.equinox.EquinoxFwConfigFileParser
#Fri Apr 03 17:03:18 IST 2015
org.eclipse.update.reconcile=false
eclipse.p2.profile=profile
osgi.framework=file\
lugins/org.eclipse.osgi_3.6.1.R36x_v20100806.jar
equinox.use.ds=true
osgi.bundles=reference\:file\
rg.apache.commons.codec_1.3.0.v201101211617.jar@4,reference\:file\:javax.transaction_1.1.1.v201105210645.jar@4,reference\:file\
rg.talend.configurator.common_5.6.1.20141207_1530.jar@1\:start,reference\:file\
rg.talend.configurator_5.6.1.20141207_1530.jar@1\:start,reference\:file\
rg.eclipse.core.runtime_3.6.0.v20100505.jar@4\:start,reference\:file\
rg.eclipse.equinox.ds_1.2.1.R36x_v20100803.jar@4\:start,reference\:file\:com.oaklandsw.data.standard.x12.5010hipaa_5.6.1.I20141123-2246.jar@4,reference\:file\:com.oaklandsw.data.standard.x12.5010hipaa.examples_5.6.1.I20141123-2246.jar@4,reference\:file\:com.oaklandsw.transform.doc19_5.6.1.I20141123-2246.jar@4,reference\:file\:com.oaklandsw.data.standard.x12.4010hipaa_5.6.1.I20141123-2246.jar@4,reference\:file\:com.oaklandsw.data.standard.x12.4010hipaa.examples_5.6.1.I20141123-2246.jar@4
drools.dialect.java.compiler.lnglevel=1.6
eclipse.product=org.talend.license.gui.licenseGui
osgi.splashPath=platform\:/base/plugins/org.talend.rcp.branding.generic_5.6.1.20141207_1530/brandings/TP_BD_DQ/icons
osgi.framework.extensions=reference\:file\
rg.talend.osgi.lib.loader_5.6.1.20141207_1530.jar
osgi.bundles.defaultStartLevel=4
eclipse.p2.data.area=@config.dir/../p2/
save it and then restart studio and see if it works.