Yes. Make sure not to specify the same installation folder and overwrite your existing ApexSQL Edit installation

Create custom menus that can be associated with Schema explorer context menus. These menus can call SQL queries or .NET assemblies

Yes. Code can be developed, tested and executed across multiple connections one at a time or simultaneously

Yes. ApexSQL Edit has a user-friendly Table designer where you can easily create and alter the tables, columns and their properties

Yes. Use Data editor to see, update, insert and delete table data

Yes. You can set space, dot, comma, tab, operators and parenthesis to be insert keys

Yes

Subversion and the following MSSCCI-compatible source control systems are supported by ApexSQL Edit:

Microsoft Visual SourceSafe
SourceGear Vault
Team Foundation Server

The following source control systems are MSSCCI/SCC compliant, but ApexSQL Edit is not fully tested with them:

SourceGear Fortress
PureCM
IBM Rational ClearCase
Serena Dimensions
QSC Team Coherence Version Manager
Qumasoft QVCS-Enterprise
AccuRev
Bazaar (BaazarNg)
Borland StarTeam
Codice Software Plastic SCM
Collabnet Subversion
ComponentSoftware CS-RCS
Dynamsoft SourceAnywhere
March-Hare CVSNT
Mercurial
Perforce 2008
Reliable Software Code Co-Op
Seapine Surround SCM
Softimage Alienbrain