Please capitalize where necessary: this model flew for the first time in april 1942 and 140 of them were built.
A: This model flew for the first time in April 1942 and 140 of them were built.

Please capitalize where necessary: did someone email you a st file and you're not sure how to open it? maybe you have found a st file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a st file related error message.
A: Did someone email you a ST file and you're not sure how to open it? Maybe you have found a ST file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a ST file related error message.

Please capitalize where necessary: 5 months ago 08:00 xcafe secretary, office, beauty
A: 5 months ago 08:00 XCafe secretary, office, beauty

Please capitalize where necessary: additional tips included universal brush with replaceable element.
A:
Additional tips included Universal brush with replaceable element.