C1 just came out with a new version 7.2.1 and the good news is they have support for the kit lens the 28-70
here are some details
Improvements & Bug Fixes
Enhanced color profiles for Phase One IQ250, Olympus E-M10 and Fujifilm X-E2.
Fixed an OpenCL related issue on the new Mac Pro with D300 and D500 graphics cards.
Fixed a number of live view issues on Mac and Windows.
Stitch AppleScript now supports the latest version of Photoshop.
Fixed an issue with Regenerate Previews on Mac.
Fixed an issue with Delete Permanently in sessions on Mac.
Fixed a couple of issues related to style management on Mac.
Fixed an issue occurring when shooting tethered to EIP on Windows.
Fixed an issue preventing renaming of files referenced by a UNC path on Windows.
Improved robustness of catalogs on Mac.
Camera File Support
Fujifilm X-T1, XQ1 and X-A1
Sony A390, a3000 and NEX-5T
Canon: EF-S 18-135mm f/3.5-5.6 IS STM and EF-S 18-55mm f/3.5-5.6 IS STM.
Nikon Waterproof 1: NIKKOR AW 10mm f/2.8 and NIKKOR AW 11-27.5mm f/3.5-5.6.
Sigma (Canon EF): 17-50mm F2.8 EX DC OS HSM, 17-70mm F2.8-4 DC Macro OS HSM | C, 18-35mm F1.8 DC HSM | A, 24mm F1.8 EX DG ASP Macro and 28mm F1.8 EX DG ASP Macro, 50mm F2.8 EX DG Macro.
Sigma (Nikon F): 20mm F1.8 EX DG ASP RF.
Sigma (Sony E): 60mm F2.8 DN | A.
Sony E: FE 28-70mm F3.5-5.6 OSS (SEL2870).
Fixed lens cameras: Canon PowerShot G16, Canon PowerShot S120, Nikon COOLPIX P7700, Nikon COOLPIX P7800 and Sony Cyber-shot DSC-RX10.