If you would like to get the latest changes and do not want to wait for stable release, do following:
In Steam client open software page, select PlayClaw. Right mouse button click, select Properties. Select Betas tab, in password field (1) enter playclawbeta, click Check code button. Then select beta channel in combo box (2).
Then switch to Local Files tab (3). Click to Delete Local Application Content (4).
Close properties, install PlayClaw again – PlayClaw beta will be installed.